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Your search returned over 400 essays for "plant cells"
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Functions of Plasmodesmata on Plant Cells - Introduction Cells communicate by transferring molecules from one to another. When a molecule is transferred it creates a reaction which then causes an effect. Within multicellular organisms there is cell-to-cell communication. Direct communication between cells can occur in two ways. One way is cell-cell recognition via interaction between surface proteins. When there is contact between cell surfaces, the proteins on the surface of the cell interact and create a signal. The other way is through cell junctions between adjacent cells....   [tags: molecules, cells, plasma membrane]
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1041 words
(3 pages)
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Compariosn of Animal Cells and Plant Cells - ... Plastids are also located in a plant cell. They are organelles that store and make compounds inside a plant cell. A chloroplast is the most important plastid inside a plant cell. The chloroplast makes light energy from the sun light and makes into sugars and oxygen. Chloroplasts helps make the food and oxygen that humans need everyday. Plant cells have a large central vacuole. The plant cells are able to push water into the vacuoles and then produces turgor preasure which reinforces the plant and makes it rigid....   [tags: nucleus, energym ribsomes, cells] 522 words
(1.5 pages)
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Comparing Animal Cells to Plant Cells - ... Most of the chemical reactions of the cell take place in the cytoplasm. The “powerhouse” or the “energy generators” of both plant and animal cells are the mitochondria. These substances convert the sugar and other organic molecules in the cell to produce ATP (adenosine triphosphate) – required as a source of energy for the chemical reactions of a cell. Furthermore, both cells have a cell membrane. The cell membrane is like the guard to a cell and controls what enters and leaves it. It is responsible for the absorption of important nutrients (e.g....   [tags: structures, cells, powerhouse] 605 words
(1.7 pages)
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The Impact of Chloroplast Movement in Plant Cells - Plant growth and development are directly influenced by the movement and positioning of the chloroplasts. Chloroplast movement is stimulated by varying external stimuli; (Kadota, Sato and Wada, 1996) submergence, water stress, low temperature, etc. and among these light-induced chloroplast movement is the most researched and commonly established. Chloroplasts in photosynthesizing plant cells change their arrangement in response to irradiation from light. This is believed to maximize their photosynthetic activity and minimize photo damage....   [tags: horticulture, biology] 858 words
(2.5 pages)
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The Effect of Osmosis in Plant Cells - The Effect of Osmosis in Plant Cells Introduction ============ Osmosis is the diffusion of water molecules across a partially permeable membrane, from a region of high concentration to a region of low concentration. The partially permeable membrane contains a series of small holes, allowing only water molecules to pass through, as shown in the diagram below. The glucose molecules (represented by red circles) are too big to fit through the membrane. As there are a greater number of water molecules (represented by blue circles) on the left side, there is a steady net flow into the right side with fewer water molecules, i.e....   [tags: Papers] 1395 words
(4 pages)
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Investigation of Osmosis in Plant Cells - Investigation of Osmosis in Plant Cells My aim is to investigate osmosis in plant cells. I will do this by carrying out an experiment to find out the percentage increase or decrease in mass (grams) of potato tube, placed in varying concentration of glucose. Background Information - The theory of Osmosis. Osmosis is a special case of diffusion that involves water. It is the movement of water molecules across a partially permeable membrane from a region of high water concentration to a region of low water concentration until equilibrium is reached....   [tags: Papers] 1328 words
(3.8 pages)
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Plant And Animal Cells - Plant and Animal Cells I. Introduction All organisms in life are composed of at least one or more cells. Cells are the basic units of life. There are three main features of a cell. First, all organisms consist of one or more cells. Second, cells are the smallest units of life and third, cells arise only from preexisting cells. These three facts are referred to as the cell theory. All cells can be categorized into two basic cell types. They are prokaryotic and eukaryotic. To distinguish where cells are placed in the two categories, what is inside the cell must first be looked at....   [tags: Biology Biological Cells Essays] 1495 words
(4.3 pages)
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Investigating Osmosis In Plant Cells - Investigating Osmosis In Plant Cells Aim: I am going to investigate whether water moves into or out of cells by osmosis, depending on the concentration on the sugar solution that the cells are placed into. I will know if osmosis has occurred when we take the mass of the plant cell, if osmosis has occurred then the mass will have increased or decreased from the original mass. Background: Osmosis is the passage of water molecules from a weaker solution (a high concentration of water) to a stronger solution (a low concentration of water) through a partially permeable membrane....   [tags: Papers] 597 words
(1.7 pages)
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Osmosis in Plant Cells - Osmosis in Plant Cells Osmosis the diffusion of water molecules, during osmosis molecules move from a low sugar/salt concentration to a high sugar/salt concentration through a semi-permeable membrane. In this experiment, I am examining osmosis in plant cells. I am using potato chips because potatoes contain catalysts. My experiment involves soaking potato chips in different strengths of glucose solution to see if the mass of the potato chip changes. I predict that the mass will change according to the strength of the solution, as the strength of the solution increases the potatoes mass will decrease....   [tags: Papers] 845 words
(2.4 pages)
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Investigating the Effect of Different Solutions on Plant Cells - Investigating the Effect of Different Solutions on Plant Cells The aim of my experiment is to find the effects of different solutions on plant cells. Osmosis is a form of diffusion, the movement of molecules to allow them to mix, which occurs in plants. When a cell containing a weak solution is next to a cell containing a stronger solution the water in the weaker solution moves towards the stronger solution. This is why I think that the pieces of potato in the concentrated solution will decrease in both weight and length....   [tags: Papers] 441 words
(1.3 pages)
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Lab Report Testing the Effects of Changing Surcrose Concentration on Osmosis in Plant Cells - Lab Report Testing the Effects of Changing Surcrose Concentration on Osmosis in Plant Cells Aim To investigate the effects of changing the sucrose concentration on osmosis in plant cells. Plan Water passes into cells through a special type of diffusion called osmosis. Water molecules diffuse through the membrane from a weak solution into a strong solution until the concentration is the same on both sides. A membrane that allows only certain molecules to pass through is called a semi-permeable membrane....   [tags: Papers] 1287 words
(3.7 pages)
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Solute Potential of Cell Sap of Plant Epidermal Cells - Solute Potential of Cell Sap of Plant Epidermal Cells Aim: To estimate the solute potential of a plant tissue. Results: Molarity of Solution Plasmolysed Cells Percentage of Cells That Were Plasmolysed .3M 1/70 .01% .4M 0/70 0% .5M 5/70 7% .6M 12/70 17% .7M 29/70 41% 1.0M 56/70 80% It must be taken into account, that the experiments procedure was changed. This could have had a great affect on the results....   [tags: Papers] 558 words
(1.6 pages)
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Investigating the Concentration of Plant Cell Sap Using Potato Tuber Cells - Investigating the Concentration of Plant Cell Sap Using Potato Tuber Cells An experiment to work out the concentration of plant cell sap using potato tuber cells First of all and the most important are the safety precautions we will take throughout this experiment · Wear safety glasses to protect eyes · Handling the acids carefully · Careful while using kitchen knife (And all the simple things such as not running etc.) Another important aspect before we start is making the experiment a fair test....   [tags: Papers] 787 words
(2.2 pages)
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Answers to Plant and Animal Questions - – Plant and Animal Essay Questions 1. In general, respiration refers to the process by which organisms undergo gas exchange. More specifically, in order for an organism to complete the process of respiration, a continuous source of oxygen is required, and as such many different organisms have undergone various structural and physiologic alterations for the taking in of oxygen. One specific living organism, which has endured such adaptations for oxygen intake, is a fish. On the notion of structural adaptations, fish have developed gills, which are in effect respiratory organs, that enable fish to extract the dissolved oxygen found in their surrounding aquatic environments....   [tags: Structure, Cells, System] 2403 words
(6.9 pages)
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What a Plant Needs to Grow - Many people wonder what a plant needs to grow. Plants are almost like human beings, they have needs and wants. Plants require what humans need to grow such as to drink, to breathe and to eat. To gain a better understanding of a plants needs, soil, what is needed for growth, and their life cycles must be examined. There are many different types of soils a plant can grow in, but a soil must provide enough nutrients for growth and development. Soil must have a large water holding capacity to store enough water for a plant....   [tags: nutrients, hydrophonics, photosynthesis ] 649 words
(1.9 pages)
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Mycorrhizas Among Plant Species - Figure. 1 - Abundance of various types of mycorrhizas among plant species, literature review from 128 publications (Brundrett, 2009) includes ca 8000 plant species, AM – arbuscular mycorrhiza, EcM – ectomycorrhiza, NM – nonmycorrhizal, Ericoid – ErM, Orchid – OrM. Arbuscular mycorrhiza The most common and abundant mycorrhiza is AM which belongs into the endomycorrhizas and inter alia associates with approximately 74% of all Angiosperm plant species, number of Gymnosperm species and some Cryptogamic species (Brundrett, 2009)....   [tags: photosynthesis, fungi, cell] 965 words
(2.8 pages)
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Similarities between a Plant and Animal Cell - What is a cell. According to Genetic Home Reference, “Cells are the basic building blocks of all living things.” There are two main branches in which a cell can be categorized. These branches are prokaryote and eukaryote. In the prokaryote category are bacteria; in the eukaryote category are plants and animals. Although plant and animal cells have a lot of differences, they also have their fair share of similarities. For instance, an animal cell has a centrosome, but so does a plant cell. An average animal cell is made up of centrioles, cytoplasm, endoplasmic reticulum (smooth ER and rough ER), golgi complex, lyosomes, microtubules, mitochondria, nucleus, nucleolus, necleaopore, and ribosome...   [tags: biological analysis]
:: 4 Works Cited
610 words
(1.7 pages)
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Major Steps in Plant Tissue Culture - ... Furthermore, auxin can induce the formation of root (Beyl, 2011) On the other hand, cytokinin is used for the shoot proliferation (Bhojwani and Razdan, 1983). Rapid multiplication can be done by transferring callus from the parent explants to the fresh medium of the same composition of elements to produce a reasonable amount of tissue (Bhojwani & Razdan, 1996). The last step in plant tissue culture is transplanting. After the plantlets undergoes the process of multiplication, transplanting take place when the plantlets are huge enough and can be removed from the culture vessel to the external environment....   [tags: genetic engineering and botany]
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1104 words
(3.2 pages)
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Plant Physiology: The Shockwave Petunia Series - ... The xylem is found towards the inside of each vascular bundle (see the diagram below), and the phloem towards the outside. In between the xylem and the phloem vessels there is a layer of cambium (see appendix). (ASBiology101, 2013). In a leaf, however, the vascular bundles form the midrib and veins of the leaf. They form a network, which gradually gets smaller and thinner with distance from the midrib. Within each vein, the xylem can be seen on top of the phloem. (ASBiology101, 2013). Xylem tissue consists of the xylem vessels to transport water and dissolved minerals; fibres to help support the plant and cells....   [tags: flowers, transpiration, proliferation] 1112 words
(3.2 pages)
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Cells, Cancer and Gene Control - ... H2O – Water) contribute to the composition of cells that are necessary to sustain life. Now that we understand the properties of life and the composition of cells, we can focus on the architecture or formation in terms of basic anatomy and physiology as our second area of exploration. The two types of cells (prokaryotic and eukaryotic) defined before have a few common things such as Plasma membrane (similar to animal cells); Cell wall (similar to plant cells); and Ribosomes, the prokaryotic cells (found in Bacteria and Archaea domains) are fractionally smaller than the eukaryotic cells and simpler in architecture....   [tags: genetic studies and engineering, oncology]
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1891 words
(5.4 pages)
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The Difference between Eukaryotic Cells - Eukaryotic cells are the most structurally advanced of the major cell types. Describe the structure and function of each of the eukaryotic organelles. Distinguish between those that are and are not membranous. Most are membranous. Eukaryotic cells, whether from animals, plants, protists, or fungi, are the most structurally advanced of the major cell types. Eukaryote are single-celled or multicellular organism whose cells contain nucleus and any other structures (organelles) enclosed within the membrane that perform specific functions....   [tags: membranous, types, structure, nucleus]
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709 words
(2 pages)
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Prokaryotic and Eukaryotic Cells - ... However, plant cells have cell walls, chloroplasts, and plastids that are not present in the animal cell. In this experiment, yogurt bacteria will be observed. Yogurt is a fermented milk product. The milk is heated to concentrate the sugars, cooled, and then injected with two different species of bacteria. By first observing bacterial smears, should be able to describe the species of bacteria in the yogurt. It is predicted that all three morphological types of bacterial cells in the yogurt will be seen....   [tags: termite gut, unicellular microorganisms, bacteria]
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1019 words
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Etymology of Andrographis Paniculata - ... It has an allelophatic property towards some plants as well as to attract pollinators. Examples of other secondary metabolites are alkaloids, flavonoids, etc (Forlag 2010). The major component found in the A. paniculata is andrographolide. It contains diterpenoid lactones like angrographolides, paniculides, farnesols, and flavonoids (Aronson 2009). Flavonoids can be isolated from the leaves, but it is mainly found in the roots (Akbar 2011). A. paniculata has shown a broad range of pharmacological effects....   [tags: plant, aerial plant] 1272 words
(3.6 pages)
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Cells and their parts - Cells are some of the smallest organisms around. All living things consist of cells, and yet they are invisible to the naked eye. Cells are the basic structural and functional units of life. Cells are made up of many different parts which allow them to function properly. All cells are separated from their surrounding by a cell membrane. The cell membrane regulates what enters and leaves the cell and also aids in the protection and support of the cell. A cell membrane is similar to the walls surrounding your house....   [tags: essays research papers] 721 words
(2.1 pages)
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Testing the Strength of Plant Fibers - Title: Testing the strength of plant fibers Objectives: To develop knowledge and understanding of the strength of plant fiber in a plant stem. To develop problem solving and experimental skills, for example, information is accurately processed, using calculations where appropriate, experimental procedures are planned, designed and evaluated properly, the use of microscopes, producing valid results and recording results. To develop techniques of measuring the size of plant fibers under microscope using stage micrometer and eyepiece graticule....   [tags: Biology]
:: 7 Works Cited
2903 words
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How Light and Wind Affect the Rate of Plant Transpiration - Introduction: The purpose of this experiment is to find out if the rate of transpiration in plants can be increased using light and wind. One of the biggest problems that land plants have to deal with is avoiding water loss or desiccation (Whiting, 2011). Transpiration is the loss of water vapor through the stomata (Xu et al. 1995). Transpiration occurs through stomata of leaves and also sometimes occurs in flowers (Vodopich and R. Moore, 2011). During transpiration, the water in the roots is being pulled up through the plant (Xu et al....   [tags: Scientific Research ]
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2026 words
(5.8 pages)
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Water Relations in Two Plant Tissues - Water Relations in Two Plant Tissues Results: Table 5 Table to show the sucrose concentration and water potential of each tissue. The sucrose solution was extrapolated from graph 1, which shows the percentage change of mass of the tissues when immersed in the different sucrose solutions. A line of best fit was drawn, where the line of best fit intercepts the x-axis (concentration of sucrose solution) is the sucrose concentration of the tissue because at this point there is no mass loss of gain (read off of y-axis)....   [tags: Lab Report] 1466 words
(4.2 pages)
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An Experiment to Investigate Osmosis in Plant Tissue - An Experiment to Investigate Osmosis in Plant Tissue Aim: To conduct an investigation to compare the osmotic behavior of two types of plant tissue in varying concentrations of sucrose solution. To find the point at which there is no change in mass or length of a specific plant tissue in a certain sucrose solution, the point of equilibrium, where sucrose and water contents are both equal in the solution and the tissue. Introduction: When a plant cell is placed in a sucrose solution there may be a change in mass and length depending on the sucrose solution and tissue itself....   [tags: Papers] 2602 words
(7.4 pages)
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Benefits and Implications of Improving Plant Productivity - Benefits and Implications of Improving Plant Productivity To increase plant productivity we can manipulate the environment, or more importantly we can improve the plants. There are many different ways that plant productivity can be improved, for example one option is to keep them in ideal, controlled environments such as glass houses and poly-tunnels. In these conditions, light intensity, temperature, CO2 concentration, moisture, etc are adjusted to suit a particular crop (2)....   [tags: Papers] 978 words
(2.8 pages)
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The Life of Prokaryotic Cells - The Life of Prokaryotic Cells For the prokaryotes, life arose on earth about four billion years ago; they are the original inhabitants of this planet. For approximately two billion years, they were the only form of life on earth. They have since then continued to adapt and flourish on an evolving earth. They are by far the simplest of cells and were the first to evolve. Out of all organisms, prokaryotes are the smallest and least complex cells. They are too small to be seen except with the aid of a microscope....   [tags: essays research papers] 647 words
(1.8 pages)
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The Effect of Osmosis on Potato Cells - The Effect of Osmosis on Potato Cells Introduction Osmosis is the movement of water molecules from an area of low concentration (lots of water) to an area of high concentration (little water) through a semi permeable membrane. A semi permeable membrane is a membrane that only lets selected molecules to pass through it. In a plant water is taken into the roots by the process of Osmosis. This is because the cells inside the roots have a higher concentration than the soil outside the roots....   [tags: Papers] 1850 words
(5.3 pages)
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The Origins of Flax Plant Production - The flax plant is thought to be one of the oldest crops in the world and one of the first crops domesticated by man (Oplinger, 1997). Originating in Mesopotamia around 3000 BC, the flax plant has been around since the stone ages. Flax plants were cultivated and used for many different things since every part of the flax plant could be used. The seeds were used to make foods or added to foods for flavor. The seeds could also be made into oil and was commonly used to make medicines, for use on the skin, and as wood preserver....   [tags: crops, agriculture, flaxseeds, lignans]
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923 words
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Cells - Cells Cells are the basic unit of all life. Even though they are the smallest unit of life they are highly complex. Each cell has enough parts to it to practically survive on its own. There are two types of cells; the plant cell and the animal cell. These two cells do not vary intensely, but there are some major factors that separate them completely. Animal cells are highly organized. The many parts that make up the cell work in synch with each other. These parts are called organelles. The most important organelle in the cell is the nucleus....   [tags: essays research papers] 360 words
(1 pages)
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Investigating Osmosis in Potato Cells - Investigating Osmosis in Potato Cells Planning: Aim:- To investigate the effect of different concentrations of sucrose solution, on potato cells Osmosis:- Osmosis is the passage of high water concentration through a semi-permeable membrane to a region of low water concentration, i.e. the passage of water. Explanation of osmosis For osmosis to occur there must be; semi-permeable membranes are very thin layers of material (cell membranes are semi-permeable) which allow some things to pass through them but prevent other things from passing through....   [tags: Papers] 1548 words
(4.4 pages)
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The Chernobyl Nuclear Plant in Ukraine - On April 26, 1986 the entire world’s view of nuclear energy changed forever (Nave Chernobyl, n.d., para. 4). This was because on that day there was a massive explosion at the Chernobyl nuclear plant in Ukraine (part of the USSR at the time). Science can be applied to this event to explain why the plant exploded in the first place. Science can be used to look at how the plant was designed to work versus how it worked at the time of explosion. This event had massive health effects on nearby humans as well as animals and plants in the area....   [tags: radiation, disaster, nuclear power]
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1005 words
(2.9 pages)
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Clones, Genes, and Stem Cells: For the Good of the People - Suppose scientists could make enough food for the entire world, bring back long extinct animals, and cure fatal diseases. Scientists are curing fatal diseases through genetic research, and cloning is on its way to bringing back extinct animals. Even though there is opposition to each of these ideas, genetic manipulation/therapy, cloning and stem cells can improve human, animal and plant life, and should be funded because they have the potential to cure fatal diseases and return extinct animals to the planet....   [tags: Medical Research]
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1534 words
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Cells And Cell Theory - Cells and Cell Theory What advantages does small size give to a cell. Many cellular processes occur by diffusion, which is efficient over short distances, but less efficient over long distances. Since all materials going in and out of a cell must pass through the plasma membrane, the greater the surface area of this membrane, the faster a given quantity of molecules can pass through. Smaller cells have a much greater surface-to-volume ratio than larger cells and therefore can "feed" all areas of the cell in less time....   [tags: essays research papers] 1053 words
(3 pages)
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Baisl: The Tulsi Plant - Tulsi The tulsi plant also known as “ basil “is very common plant in Indian Households.It is the most sacred of all the herbs found in India.It has benn used in India from more then 5000 years and is well known for its healing properties on mind,body and soul.The tulsi plant is also known as Ocimum tenuiflorum.The plant is widely popular in south Asian countries. There are three variants of Tulsi; Rama Tulsi, Krishna Tulsi and Vana Tulsi. Each of the variants has its own distinctive taste. The Generally leaves, seeds and dried roots are the parts of the holy basil are used in medicines....   [tags: healing properties, aromatic herbs] 1105 words
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Case Study: Zero Sludge Production of a Slaughterhouse’s Wastewater Treatment Plant. - Slaughterhouses produce high strength wastewater (EC, 2005), which contain high levels of biodegradable organic matter, as faecal, undigested food, blood, suspended material (Jian and Zhang, 1999). Slaughterhouse wastewater composition in terms of organic strength, inorganic elements, alkalinity, and pH is adequate for biological treatment (Massé and Masse, 2000). Design criteria for slaughterhouse wastewater treatment plants are widely published (Travers & Lovett, 1984; Li et al, 2008). Generally, variations in slaughterhouse wastewater composition are significant, depending on the production procedures, byproducts’ recovery and cleaning procedures (Pozo et al., 2003)....   [tags: Sludge, Biology, Contamination]
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943 words
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About Cells - About Cells Cell, smallest unit of an organism that can function independently. All living organisms are made of cells, and it is generally held that nothing less than a cell can truly be said to be alive. Some microscopic organisms, such as bacteria and protozoa, are single cells whereas animals and plants are composed of many millions of cells assembled into tissues and organs....   [tags: Papers] 2428 words
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Prokaryotic Cells - Prokaryotic Cells All living things are made of cells, and cells are the smallest units that can be alive. Life on Earth is classified into five kingdoms, and they each have their own characteristic kind of cell. However the biggest division is between the cells of the prokaryote kingdom (monera, the bacteria) and those of the other four kingdoms (animals, plants, fungi and protoctista), which are all eukaryotic cells. Prokaryotic cells are smaller and simpler than eukaryotic cells, and do not have a nucleus....   [tags: Papers] 794 words
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Eukaryotic Cells - Eukaryotic Cells The cell may be regarded as the basic unit of an organism, it carries out the essential processes that make the organism a living entity. All cells share certain structural and functional features and they are of almost universal occurrence in living organisms. Biologists have devoted a great deal of attention to its structure and the processes that go on inside it. They have recognised a major distinction between two types of cells, Eukaryotic cells that have a nucleus and Prokaryotic cells that do not have a nucleus....   [tags: Papers] 1229 words
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Plant Material - Plant material The seeds of A. precatorius were collected from the medicinal plant garden of Department of Pharmaceutical Sciences, Dr. H. S. Gour University, Sagar, M.P., India. Seeds were sterilized and germinated by following the protocol described in our previous publication .[15] Initiation of A. precatorius cell cultures Different explants from aseptically germinated seeds viz. leaves, epicotyle and petiole were tested for culture initiation by variation in plant growth regulators (PGR) and Agrobacterium mediated transformation....   [tags: Plants, Seeds] 2549 words
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Finding the Water Potential of Potato Cells - Finding the Water Potential of Potato Cells Aim: Our aim was to discover the water potential of potatoes cells using different concentrations of sucrose solution Science: Osmosis is 'the movement of water molecules from a region of higher water potential to a region of lower water potential through a semi-permeable membrane' www.s-cool.co.uk 'Water can move between cells (unligninified) freely as the cell walls are permeable. However its movement is controlled by a number of factors, which are given names; solute potential ([IMAGE]), Pressure potential (+ Matrix potential =0 normally)([IMAGE]) and water potential ([IMAGE])....   [tags: Biology Lab Report] 2239 words
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Temperature and its Effect in Enzyme Catalyzed Reactions - ... The first catalase ever to be noted as a substance was discovered in 1818 by Louis Jacques Thénard. He is the man who discovered hydrogen peroxide. He suggested that its breakdown was caused by a substance. In 1900, Oscar Loew was the first person to give it the name ‘catalase’, and also noticed that its presence was found in many plants and animals. Also, in 1937 the catalase enzyme from beef liver was crystallized by James B. Sumner and its molecular weight was worked out in 1938. (www.Chemistry explained.com; Chemistry Encyclopedia) Usually enzymes have three dimensional structure and always end with the letters 'ase'....   [tags: Cells, Chemistry] 557 words
(1.6 pages)
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A Brief Look at the Endomembrane System - A main difference that sets eukaryotic cells apart from prokaryotic cells is that eukaryotic cells contain a highly ordered and complex endomembrane system. It is thought that the endomembrane system evolved very shortly after Eukarya diverged from bacteria and archaea. The endomembrane system is composed of membrane bound organelles and these organelles are formed by lipid bilayers. When the bilayers fold they create separate compartments that do not include the cytosol. This folding is an energetically favorable process....   [tags: eukaryotic cells] 2834 words
(8.1 pages)
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Investigating the Water Potential of Celery Cells - Investigating the Water Potential of Celery Cells Aim === I will be investigating the water potential of celery and to find out which solution will be isotonic with the celery cells, in other words equilibrium between the two no water will leave the cell, or enter. I will do this by following this method. Method 1. Cut a 5 cm length of celery stem 2. Cut through the grooves to divide the stem into thin strips 3. Dry the cell sap from the strips using a paper towel 4....   [tags: Lab Report] 862 words
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Large Molecules In the Structure And Functioning Of Cells - Large Molecules In the Structure And Functioning Of Cells Large biological molecules are found in all cells, in plant and animals cells too. There are many different large biological molecules such as carbohydrates, proteins, lipids, nucleic acids which are all extremely important to the functioning and structure of living cells. We would not be alive if any of these groups were missing. This signifies their importance. Carbohydrates contain three elements. Carbon (C), Hydrogen (H) and Oxygen (O) Carbohydrates are found in three forms....   [tags: Papers] 855 words
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Investigate the Water Potential of Potato Cells - Investigate the Water Potential of Potato Cells Introduction In my investigation, I hope to determine the water potential of potato cells. The plant material I will use in my investigation will be potato chips, which I will cut myself prior to the investigation. I hope to find the concentration of a solution where the chip stays the same mass and length, which will tell me that the water potential inside the cells is the same as the water potential outside the cells. Background Osmosis is defined as the movement of water through a semi-permeable membrane....   [tags: GCSE Biology A2 A-Level Coursework] 2469 words
(7.1 pages)
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Water Potential of Potato Tuber Cells - Water Potential of Potato Tuber Cells AIM: To find the water potential of potato tuber cells. HYPOTHESIS: When cells are put in a solution with a different water potential than inside of them, cells will gain or loose water. If concentration of solution is the same, there will be no change in mass. THEORETICAL BACKGROUND: If a sample of tissues immersed in solution of varying water potential (concentration of water molecules), the cells will loose or gain water by osmosis....   [tags: Lab Report] 1107 words
(3.2 pages)
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The Tea Plant - The Tea Plant The tea plant (Camellia sinensis) is one of about 80 species of East Asian evergreen shrubs and trees that belong to the tea family, or Theaceae. Tea reaches a height of 9 meters but is kept pruned to a low, mounded shrub in cultivation. The foliage is emerald green, while the flowers are fragrant, yellow-centered, white and about 4 centimeters wide. History Tea plant cultivation began about 4,000 years ago in its native country, China. The Japanese did not discover the plant until the 8th century A.D., and cultivation was established by the 13th century....   [tags: Botany]
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2210 words
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Biology Answers to Quiz: Cells - 1. I believe that these polymers, Cellulose, starch and glycogen have different properties because they are used in different organisms. Cellulose and starch are mainly used in plants and glycogen is used in animals. Cellulose is used for strength in its stems and leaves and uses starch for help with storing things. Glycogen is used in animals to help store things as well. These polymers have different properties because they have different functions in different organisms. 2. Diffusion is the spreading out of particles from an area of high concentration to an area of low concentration....   [tags: Cellulose, Difussion, ATP] 532 words
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the plant cell - The Plant Cell Cell Wall Size: Around 1µ Basic Function: * Hold the shape of the cell. * Strengthen the cell. Covering the cell membrane of the plant cell, there is the cell wall. The cell wall is composed of two layers of rigid, hard cellulose embedded in compounds like pectin and lignin. Pores in the cell wall allow molecules to pass through. The cell wall has two parts. The primary cell wall is formed during the growth of the cell. After the cell has stopped growing, a secondary cell wall forms....   [tags: essays research papers] 822 words
(2.3 pages)
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Determining the Water Potential of Potato Tuber Cells - Determining the Water Potential of Potato Tuber Cells I will carry out an investigation that will enable me to determine the water potential of the tested potato tuber cells. Water Potential is the measurement of the tendency of water molecules to move from one place to another. (Ridge 1991) Water always moves down the water potential gradient, therefore moving from an area of higher water potential to an area of lower water potential. Equilibrium is reached when the water potential in one region is equal to the water potential in another region....   [tags: Lab Report] 2562 words
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Damn Near Everything There Is To Know About Cells: - Damn Near Everything There Is To Know About Cells: Biology Cell Report There are many parts of a cell, they all have specific duties, and are all needed to continue the life of the cell. Some cells exist as single-celled organisms that perform all of the organism's metabolism within a single cell. Such single-celled organisms are called unicellular. Other organisms are made up of many cells, with their cells specialized to perform distinct metabolic functions. One cell within an organism may be adapted for movement, while another cell carries out digestion....   [tags: essays research papers] 1116 words
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An investigation of the glucose concentration of the cell sap in potato cells - An investigation of the glucose concentration of the cell sap in potato cells In this experiment I intend to investigate the effects of osmosis on potato cells. Specifically, I intend to use my knowledge of osmosis to investigate the glucose concentration of the cell sap in potato cells. Osmosis is a method by which water levels on either side of a semi permeable membrane may balance themselves. It occurs between regions of high water concentration and low water concentration. As it is a special method of diffusion exclusive to water, it also allows dilute and concentrated solutions to balance their strengths....   [tags: GCSE Biology Osmosis Coursework]
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3449 words
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Investigation of Osmosis in Plant Tissue - Investigation of Osmosis in Plant Tissue Aim To investigate factors which affect the rate of osmosis. The main factors which affect osmosis are: Pressure Temperature Surface area Solute Concentration Plant Tissue We will be investigating solute concentration as this is the easiest factor to measure and will give us the most accurate results. We will mainly investigate the different rate of osmosis when potato cells are placed in solution with different solute concentrations....   [tags: Papers] 1076 words
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Understanding the Marijuana (Cannabis) Plant - Understanding the Marijuana (Cannabis) Plant Cannabis sativa, the hemp plant, grows wild throughout most of the tropic and temperate regions of the world. Prior to the advent of synthetic fibers, the cannabis plant was cultivated for the tough fiber of its stem. In the United Stated, cannabis is legitimately grown only for scientific research. In fact, since 1980, the United States has been the only country where cannabis is licitly cultivated for scientific research. Cannabis contains chemicals called cannabinoids that are unique to the cannabis plant....   [tags: Papers] 707 words
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Eukaryotic Cells are Deemed as a Result of the Evolution of Symbiotic Prokaryotes - Eukaryotic Cells are Deemed as a Result of the Evolution of Symbiotic Prokaryotes Both Prokaryotic and Eukaryotic cells over time have sustained very dynamic changes from one another. More specifically we have seen the appearance of a more complicated and organized cell structure, the nucleus. However the big question amongst scientists today is how did these changes first occur. A fundamental concept of this evolution is the belief in the natural progression 'from the simple, to the more complex.' However one popular theory that argues that Prokaryotic symbiosis was responsible for forming the Eukaryotic nucleus is the 'Endosymbiotic Theory' this theory was first...   [tags: Papers] 548 words
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The Health, Biology, Culture and History of The Ginger Plant - Because ginger is so healthy and has many other useful properties, the plant has become a popular form of natural medicine as well as food around the world and has been relatively popular in the past as well. As soon as people discovered the inflammatory properties among other health benefits of ginger, it became popular reasonably fast as well as well known medicine for aiding in relief in arthritis and inflammatory related pain and different forms of nausea. Ginger has become popular around the world for its health benefits as well as many other properties it can give, like a pungent taste used for spices and good smell....   [tags: natural medicine, food, spices]
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Cancer Cells and the Insulin-Growth Proteins - What if we use what our bodies already produce and use that to combat cancer. Proteins are large molecules that have multifunctional roles in our bodies. They are involved in almost all of our cell functions, like carrying and distributing oxygen throughout our bodies to creating our skin cells. They are the structure to all of our biological cells within all living things. A couple of scientists, from the Chinese University of Hong Kong, conducted several experiments manipulating and creating proteins to inhibit breast cancer cells and colon cancer cells from developing....   [tags: cancer, protein, hormone] 1006 words
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Fossil Fuel Consumption and Greenhouse Gas Emission - Fuel cells powered by hydrogen represent the latest technology in the push to reduce fossil fuel consumption and greenhouse gas emission. The internal combustion engine’s design limitations have been pushed to their limits and fuel economy has been maxed out. While a shift in consumer preference to smaller and more fuel efficient automobiles would decrease consumption and emissions, the economic model alone will not prompt such a change. The hydrogen fuel cell’s new technology calls for a radical change in design approaches that will test the automakers that choose to mass-produce this technology....   [tags: hydrogen, fuel cells, environment]
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Plant hormones - Plant hormones are specialized chemical substances produced by plants. They are the main internal factors controlling growth and development. Hormones are produced in one part of a plant and transported to others, where they are effective in very small amounts. Depending on the target tissue, a given hormone may have different effects. Plant hormones play an integral role in controlling the growth and development of plants. A plant hormone is generally described as an organic compound synthesized in one part of the plant and translocated to another part, where in low concentrations elicits a physiological response....   [tags: essays research papers] 1573 words
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The Effect of Light on the Organic Plant Elodea - The Effect of Light on the Organic Plant Elodea Aim: To calculate the rate of photosynthesis from the number of oxygen bubbles produced by the plant. Photosynthesis: The process by which green plants use the sun's energy to build up carbohydrate reserves. Plants make their own organic food such as starch. Plants need Carbon dioxide, water, light and chlorophyll in order to make food; and starch and oxygen are produced. Carbon dioxide and water are the raw materials of photosynthesis....   [tags: Papers] 845 words
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The Benefits and Implications of Improving Plant Productivity - The Benefits and Implications of Improving Plant Productivity Ever since man started farming, he has tried to improve the crop production. There are many methods that can be done to achieve this, and modern technology allows for a huge choice about what can be done with terms of the productivity of crops. [2] Selective breeding has been done by farmers for years, where crops were chosen if they had high yield for example, and then bred so that the farmers overall yield would be higher....   [tags: Papers] 810 words
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Cloned stem cells may give you a new lease of life - Cloned stem cells may give you a new lease of life (A new lease of life means “an opportunity to improve someone’s future”) Summery Paragraph The name of my article is “Cloned stem cells may give a new lease of life” I found this article in the “New Scientist” magazine. It was published on November 8, 2002. The article is telling us about how to use therapeutic (treatment) cloning to take adult cells from a human body, create cloned embryos (animal or plant in the early period of its development before it is born or grown) and remove stem cells that can turn into a wide range of tissues (a bunch of cells forming an animal or plant....   [tags: Biology] 462 words
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The Effect of Different Strength of Salt Solutions on Potato Cells Through Osmosis - The Effect of Different Strength of Salt Solutions on Potato Cells Through Osmosis An Investigation to find out how different strengths of salt solution affect potato cells through osmosis. Aim I aim to investigate the effect of different concentrations of salt solution on potato cells when osmosis occurs. Introduction I intent to set up this experiment using equally sized cylinders of potato submerged in salt solutions of different concentrations. I will then observe the percentage change in mass over a set period of time....   [tags: Papers] 1868 words
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Stem Cell Research - There are many questions regarding stem cell research. What are they. Why are they important. Where do you get them. How can they be used. What ethical issues have they brought up among us. Stem cell research is a very controversial, yet promising study. “Stem cells are like little kids who, when they grow up, can enter a variety of professions. A child might become a fireman, a doctor, or a plumber, depending on the influences in their life- or environment. In the same way, these stem cells can become many tissues by making certain changes in their environment” (Parks 8)....   [tags: genetic engineering, embryonic cells]
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Fuel Cells s a Method of Powering a Bus - Hydrocarbon based fuels have become a mainstay of day-to-day life, and for many access to cheap fuel allows them to afford to get to work. As humanity’s need for cheap energy increases, and available oil reserves diminish, it is becoming increasingly important to develop alternative fuel sources, as well as increase reliance on public transportation, such as busses for local travel. As we begin to utilize public transportation more effectively, it’s important to research technology that will help improve both fuel economy, and reduce emissions....   [tags: Energy]
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An Investigation on How Different Levels of Sugar Concentration Can Affect Potato Cells - An Investigation on How Different Levels of Sugar Concentration Can Affect Potato Cells AIM: My aim for this experiment is to see the results of potato tissue's mass difference, when placed in different concentrations of sugar solutions. Also my aim for this experiment is to estimate the concentration of cell sap within the potato cells. Variables involved: For this experiment I would expect to have 3 different variables, Independent, Dependent, and fixed variables, which all help me to plan and explain the experiment thoroughly....   [tags: Papers] 2863 words
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Investigating the Effects of Different Concentrations of Sucrose Solution on Potato Cells - Investigating the Effects of Different Concentrations of Sucrose Solution on Potato Cells Aim: to investigate the different effects of various concentrations of sucrose solution on potato cells. Introduction: Osmosis is a special type of diffusion. Osmosis happens when two solutions of different concentrations are separated by a selectively permeable membrane. A selectively permeable membrane has holes in it which are just big enough for water molecules to pass through, but not the much larger sugar molecules....   [tags: Papers] 2636 words
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Tuber Cells - DETERMINATION OF THE WATER POTENTIAL OF POTATO TUBER CELLS. Method. Five sucrose solutions with varying molarity and one control containing distilled water were prepared and poured into test tubes. The potato discs were dried, weighed and added to the test tubes. The discs were then weighed again after a period of 24 hours. The percentage change in mass was then calculated. Apparatus.  Specimen tubes with stoppers x6  1cm3 diameter cork borer  razor blade  filter papers  balance  distilled water  sucrose solutions with varying concentrations  potato cut into small discs Results....   [tags: essays research papers] 1159 words
(3.3 pages)
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The Effect of Light Intensity on the Rate of Oxygen Production in a Plant While Photosynthesis is Taking Place - The Effect of Light Intensity on the Rate of Oxygen Production in a Plant While Photosynthesis is Taking Place Hypothesis: I predict that as the intensity of light is increased, so would the photosynthesis. Furthermore, I predict that if the light intensity increases, the rate of photosynthesis will increase at a proportional rate and more oxygen will be produced and therefore the oxygen levels will increase. However, the lower the light intensity, less oxygen will be produced which would affect this investigation....   [tags: Papers] 512 words
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The Effect of Light Intensity on the Rate of Photosynthesis in an Aquatic Plant - The Effect of Light Intensity on the Rate of Photosynthesis in an Aquatic Plant Introduction The input variable I will be investigating is light, as light is just one of the 4 factors required in the green-plant process of photosynthesis. Photosynthesis is the process by which green-plants use sunlight, carbon dioxide, water & chlorophyll to produce their own food source. This process is also affected by the temperature surrounding the plant (the species of plant we experimented with, pond weed, photosynthesised best at around 20 degrees centigrade.) Light, temperature & CO2 are known as limiting factors, and each is as important as the next in photosynthes...   [tags: Papers] 4194 words
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Hydrogen Fuel Cells - As time goes on, technological advances require more efficient sources of power. At the forefront of research for these power sources are hydrogen fuel cells. This power source takes in the most abundant element in the universe, Hydrogen, and yields immense power without combustion or pollution. The three aspects of this scientific breakthrough are the fuel cells, hydrogen production, and hydrogen storage. Fuel cells are the devices with which Hydrogen is made into electricity. These use a technology much similar to that of something we are very familiar with: the battery....   [tags: Informational Alternative Power Source Hydrogen] 1024 words
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Cranberries Help Prevent Cancer - Potent, pucker-inducing, and attractive, cranberries have been around the holiday table for about 400 years. Native Americans used crushed cranberries to preserve pemmican, a dried meat blend that, thanks to the benzoic unpleasant in the little red berries, resided well maintained and palatable over the winter. Pilgrims served cranberries at the first Thanksgiving dinner, starting one of numerous customs that we still perform today. You may have endeavored cranberry juice and dressing, or snacked on the dehydrated fruits....   [tags: healthy food, plant chemicals]
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Revealing Metabolic Phenotypes in Plant - Introduction Metabolomics is the ‘omics’ science of metabolism and its definition is in analogy with other part of biological science genomics, transcriptomics and proteomics. The metabolome or study of metabolites covers all the compounds formed in a biological system, from an organelle to a whole organism. Also, metabolome can be explained as the entire set of small molecules (non-polymeric compounds with a molecular weight less than ~1000Da) that are found in general metabolic reactions as byproduct and that are biosynthesized by a vital system like cell, tissue or organism....   [tags: Biology Science]
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Crude Extracts in Tsaang- Gubat as Potential Therapeutic Agents for Treating Cancer - ... With its high success, cultures around the globe have long used these medicinal plants to treat various ailments especially cancer. (Broadhurst, Polansky, & Anderson, 2000; Igbinosa, Igbinosa, & Aiyegoro, 2009; Manoharan & Kaur, 2013; Mouli, Vijaya, & Rao, 2009; Saleem, Husheem, Härkönen, & Pihlaja, 2002; Tayarani-najaran & Emami, 2011). There are lots of medicinal plants accessible in nature that is proved to have anti-cancer properties. The use of plant extracts in traditional medicine continues to provide health coverage for over 80% of the world’s population, especially in the developing world (Igbinosa et al., 2009)....   [tags: philippine tea tree, medicinal plant]
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1619 words
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Radiation-Induced Bystander Effect (RIBE) - Background: Radiation-induced bystander effect (RIBE) is defined as a phenomenon that occurs when radiation signals are transmitted from irradiated cells to non-irradiated ones, inducing radiation effects in them. RIBE has an effective role in radiation response at low doses as well as in radiotherapy due to affecting normal tissues adjacent or far from the irradiated tumor. Reactive oxygen species have an important role in RIBE induction; therefore, the present research was conducted to investigate the possible inhibitory effects of garlic as an antioxidant-containing plant on RIBE....   [tags: cells, gamma rays, medicinal herb, garlic]
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1542 words
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Review of Research Paper on RNA in Mammalian Cells - Review of Research Paper: Duplexes of 21-nucleotide RNAs mediate RNA interference in cultured mammalian cells Overview The significance of this experiment is that it shows how siRNA suppresses the expression of genes in different mammalian cells. It was known previous to the experiment that dsRNA can trigger apoptosis in cells- this is an automatic defense mechanism that mammalian cells use to protect against the dsRNA possessed by viruses. The dsRNA can cause RNA interference when it is taken into the cell by a transgene or a virus....   [tags: Biology] 1169 words
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