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Stomata Leaf Peel Count - Stomata Leaf Peel Count Aim: · To examine the stomata on the upper and lower epidermis of a leaf. · To investigate and find out which side has more and why. Prediction: I predict that there will be more stomata on the underside of the leaf (the lower epidermis) than on the upper epidermis because that way the maximum amount of sunlight can enter the leaf without many stomata blocking the way. Also, a lower number of stomata would increase the surface area and therefore increase the amount of area available for light to hit....   [tags: Papers] 330 words
(0.9 pages)
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Stomata Count Experiment - Stomata Count Experiment Aim To peel the epidermis layer from underneath of the plant leaf and count the average distance between the stomata. Background Info Guard cells open and close to let stomata take in Carbon Dioxide that is required for plants to make glucose in photosynthesis, the Carbon Dioxide comes in through stomata, which consist of guard cells which contract and relax (become turgid and flaccid) depending on the amount of water that inside them making them turgid....   [tags: Papers] 424 words
(1.2 pages)
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Investigating the Amount of Stomata on a Variety of Different Sized Leaves - Investigating the Amount of Stomata on a Variety of Different Sized Leaves Introduction During this experiment I am going to investigate the stomata on a large leaf and a small leaf from the same plant to compare the amount of stomata per mm². The stomata are small openings found in the lower epidermis of leaves. Each stoma is surrounded by two bean-shaped guard cells containing chloroplasts. A stoma is a very efficient structure because it can control the rate of transpiration (water loss) and the exchange of gases....   [tags: Papers] 1321 words
(3.8 pages)
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Investigating Into the Possible Existence of Distribution of Stomata Within Different Leaf Types - Investigating Into the Possible Existence of Distribution of Stomata Within Different Leaf Types The aim of my particular experiment was to investigate into the possible existence of distribution of stomata within different leaf types. My investigation also requires me to research into the rate of transpiration into the different leaf types and if this has an effect of the distribution of stomata on the leaves surface. Prediction I predict that the environment of which I found my particular leaf type had an effect on the stomata distribution in my particular leaf type....   [tags: Papers] 3941 words
(11.3 pages)
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Investigating the Relationship Between the Transpiration Rate of a Shoot and the Degree of Opening of the Stomata of Its Leaves - Investigating the Relationship Between the Transpiration Rate of a Shoot and the Degree of Opening of the Stomata of Its Leaves I will be investigating the relationship between the transpiration rate of a shoot and the degree of opening of the stomata of its leaves. Transpiration is the loss of water vapour from the surfaces of a plant. Solar energy turns the water in the plants into a vapour causing it to evaporate into the leafÂ’s internal air spaces before diffusing out of the stomata into the air....   [tags: Papers] 1201 words
(3.4 pages)
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How Light Affects the Stomatal Opening in a Leaf - How Light Affects the Stomatal Opening in a Leaf Abstract ======== My aim of this investigation was to check the affect of environmental factors affecting stomatal opening. My experiment was designed to check the stomata opening in light. Plants move in ways that may not seem obvious. The opening and closing of stomata is one example of this movement. There are a large amount of growth conditions that can affect a plant. One of the most important of these conditions concerns the type of availability of light present for photosynthesis....   [tags: Papers] 1639 words
(4.7 pages)
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How Light and Wind Affect the Rate of Plant Transpiration - ... The goal of this experiment is to see if environmental factors cause the rate of transpiration to increase or decrease. In this experiment, only light and wind are specifically investigated. The hypothesis of this experiment was if wind and light are introduced to the Creole hybrid tomato plant then the rate of transpiration will increase. Methods: Before this experiment was conducted, the Transpirometer was set up. The apparatus was prepared by flushing the system by opening the valve below the reservoir....   [tags: Scientific Research ]
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2026 words
(5.8 pages)
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Loss in Mass Through Transpiration - Loss in Mass Through Transpiration Aim: · To investigate the loss of water and mass in the leaf · To find out if more water is lost sat the top/bottom of the leaf Prediction: I predict that the leaf without any Vaseline on it would lose the most mass and water because there is nothing blocking the stomata, therefore water will evaporate, but no water will be taken in. The next one that will lose the most water will be the one with Vaseline on the top only. This is because there are more stomata on the bottom and therefore more water will be lost than if there was Vaseline only on the bottom, which has a lower number or stomata....   [tags: Papers] 451 words
(1.3 pages)
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Measuring Rate of Rater Uptake by a Leafy Shoot - Measuring Rate of Rater Uptake by a Leafy Shoot The water uptake can be measured easily and because very high proportion of the water taken up by a stem is lost in transpiration, it enables the rate of transpiration to be measured. Key Factors to be kept Constant: - ================================== v Temperature - room temperature (approximately 25ºC) v Wind speed - No artificial wind was produced to affect results v Light intensity - Extra light was not used v Humidity - it was not humid on the day experiments were conducted The water uptake for the control Experiment....   [tags: Papers] 1387 words
(4 pages)
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Investigating if the Number of Leaves Affect the Water Loss From the Previt and the Stem and Leaves - Investigating if the Number of Leaves Affect the Water Loss From the Previt and the Stem and Leaves Ideas. · The amount of water in leaves. · The thickness of the stem. · The number of leaves. · Size of the roots. · Temperature. · The amount of leaves that are left on the stem. · And finally the sizes of the leaves. AIM. Our Aim is to find out if the number of leaves affects the water loss from the Previt and the stem and leaves. I am going to keep everything the same except for the temperature and the water....   [tags: Lab Report] 457 words
(1.3 pages)
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Investigation of Transpiration - Investigation of Transpiration Transpiration is the loss of water from a plant by evaporation. Water is essential for plants as it is required for photosynthesis to produce glucose; all organisms derive their energy from the oxidation of glucose, minerals and ions are dissolved in water and bring them from the roots to other plant tissue that require the minerals. Also, water keeps the plant cool. The plant undergoes several processes in order for it to lose the amount of water through the lower epidermis of a leaf....   [tags: Papers] 783 words
(2.2 pages)
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The Greenhouse Effect, A Torrent of Information, and the Politics of Mass Uncertainty - The Greenhouse Effect, A Torrent of Information, and the Politics of Mass Uncertainty Introduction: Global warming, the ozone layer, and deforestation are becoming increasingly discussed topics both in the international community and society. Former Vice-President Albert Gore stated in his 1992 book Earth in the Balance, “The process of filling the atmosphere with CO2 and other pollutants…is a willful expansion of our dysfunctional civilization into vulnerable parts of the world” (Wittwer 21)....   [tags: Science Scientific Essays, climate change]
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1979 words
(5.7 pages)
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Affects of Smoking on Plants - Cigarettes contain more than 4,000 different chemicals, including arsenic, acetone, ammonia, benzene, butane, hydrogen cyanide and formaldehyde. Some of these chemicals actually may benefit the plant. Smoke of all kinds, including cigarette smoke, increases the amount of carbon dioxide where it is present. Plants use carbon dioxide to make sugars during photosynthesis. Its increased abundance, therefore, makes it easier for the plant to obtain. Smoke also contains carbon monoxide which plants are able to convert into carbon dioxide.....   [tags: Smoking, informative, expository] 703 words
(2 pages)
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Effects of Enhanced Concentration of Carbon Dioxide on Plants - ... Also found was an increased leaf dry weight at higher concentrations, but the leaf area wasn't noticeably effected at any concentration.10 Adaptation plays an enormous role in my experiment because the plants weren’t fully adapted to the high amount of carbon dioxide that the plants were exposed to. The Phaseolus vulgaris plants I used in the tank had so much excess carbon dioxide, and not enough oxygen or nitrogen to stay alive. One of the studies I researched had mentioned how they found larger leaves when the plants were exposed to a high concentration of carbon dioxide.14 As of right now, the average amount of carbon dioxide that plants are getting is 367.0 ppm....   [tags: Botany, Environmentalism]
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(2.9 pages)
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Devonian Period - ... The adaptation to seeds meant a better chance for survival in the unpredictable climate of the Devonian Period. Seeds are able to withstand a variety of climate conditions while spores rely on water and moist conditions. Early Devonian Plants were small and were limited to shores and riverbanks. They lacked roots, leaves, and structural strength to grow taller than a few feet (Hogan). However, all these features would be present by the end of the period thus enabling the growth of large trees and other plants....   [tags: Geology ]
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1683 words
(4.8 pages)
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Diverrsity Of Plants - Diverrsity of Plants Plants evolved more than 430 million years ago from multicellular green algae. By 300 million years ago, trees had evolved and formed forests, within which the diversification of vertebrates, insects, and fungi occurred. Roughly 266,000 species of plants are now living. The two major groups of plants are the bryophytes and the vascular plants; the latter group consists of nine divisions that have living members. Bryophytes and ferns require free water so that sperm can swim between the male and female sex organs; most other plants do not....   [tags: essays research papers] 2874 words
(8.2 pages)
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Determining the Effect of Light Intensity on Photosynthesis - Determining the Effect of Light Intensity on Photosynthesis Aim In this experiment, I intend to alter the light intensity and measure its effect on photosynthesis through the production of oxygen Introduction Photosynthesis is the process by which green plants provide a source of energy for respiration. The formula is as follows- Carbon dioxide + water Carbon dioxide and water are chemically combined to produce glucose (the energy source) and oxygen (a waste product)....   [tags: Papers] 1671 words
(4.8 pages)
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The Effect of Light Intensity and Temperature on the Rate of Photosynthesis - The Effect of Light Intensity and Temperature on the Rate of Photosynthesis Aim The aim of my experiment is to determine whether intensity of light and temperature would affect the rate of photosynthesis in a plant. To do this, I will place a piece of pondweed in varying light intensities and temperatures, and observe the amount of oxygen being given off. I am using pondweed because of its unusual quality of giving off bubbles of gas from a cut end, when placed in water. Introduction Photosynthesis occurs only in the presence of light, and takes place in the chloroplasts of green plant cells....   [tags: Papers] 2128 words
(6.1 pages)
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Investigating Transpiration in Plants - Investigating Transpiration in Plants Hypothesis I predict that the plant will loose more water through transpiration when the fan is closer to the plant. I think that the distance of the fan from the plant and the water loss are inversely proportional, that is the greater the distance between fan and plant, the smaller the percentage loss of mass. I predict also that at a certain distance, the fan will no longer have an effect, or minimal effect, on the transpiration of the plant and the water loss will be constant....   [tags: Papers] 1075 words
(3.1 pages)
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Photosynthesis Practical - Photosynthesis Practical Introduction- Photosynthesis is the chemical process, which takes place in every green plant to produce food in the form of glucose. Plants use the suns energy to join together water and carbon molecules to make the glucose, which is sent around the plant to be used in respiration. 6CO + 6H O ® C H O + 12O (in the presence of light energy and chlorophyll) Aim- The aim of the experiment is to determine what effect light intensity has upon the rate of photosynthesis of Canadian Pondweed (Elodea)....   [tags: Papers] 1289 words
(3.7 pages)
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Investigating the Effect of Light Intensity on the Size of a Plantain Leaf - Investigating the Effect of Light Intensity on the Size of a Plantain Leaf Title: To investigate the effect of light intensity on the size of a plantain leaf. Hypothesis: I predict that the size of the plantain leaves would increase as the light intensity decreases. Therefore, plantain leaves found in the shade will have larger surface areas than leaves found in an open area. Theory: Sunlight is an essential factor need to complete the process of photosynthesis. Photosynthesis consists of the following equation: Sun light Carbon dioxide + Water ========> Glucose + Oxygen Chlorophyll Chlorophyll is a substance found in chloroplasts, found in the cells of leaves....   [tags: Papers] 1322 words
(3.8 pages)
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The Effect of Light on the Size of Ivy Leaves - The Effect of Light on the Size of Ivy Leaves Aim --- Design an experiment to investigate if light affects the size of Ivy leaves Plan ---- In this experiment I will explore how light affects the size of Ivy leaves. I will use the common Ivy called Hedera helix. I will take two stems of Ivy, one from the part of the garden that is exposed to lots of light, and one which exposed to little light. The Ivy leaves that are facing the south of the garden will have been exposed to high light intensities, whereas the leaves facing the North of the garden will have been exposed to low light intensities....   [tags: Papers] 694 words
(2 pages)
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Rates of Reaction Investigation - Rates of Reaction Investigation Aim - We are trying to see what effect changing light intensity has on the volume of oxygen produced. Prediction - Photosynthesis is where a plant uses sunlight, carbon dioxide and water to produce oxygen and glucose. The equation for this is: Carbon dioxide = water ====== glucose = oxygen I predict that as the lamp is placed further away from the plant the amount of oxygen produced will decrease. The factors that will affect the rate of photosynthesis are the amount of sunlight, the amount of carbon dioxide and water....   [tags: Papers] 1453 words
(4.2 pages)
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Seed Germination - Seed Germination Seed germination is the process in which seeds or spores sprout and begin to grow after being dormant for a period of time. The length of dormancy varies depending environmental conditions in which the seed is surrounded by. The environmental conditions that determine when a seed will begin to germinate are the temperature, oxygen, the amount of light, and the supply of water (Germination, accessed 23 February 2010, http://www.answers. com/topic/germination). For a seed to begin germinating the temperature should be between 25 to 30 degrees Celsius....   [tags: Experiment Analysis]
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(2.2 pages)
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Different wavelengths of light affect on photosynthesis rates in tomato plants - Background Information: The leaves of a plant are the main photosynthetic organs and are involved in gas exchange and water transportation throughout a plant (Evans et al, 17). A leaf typically consists of an upper and lower epidermis, the mesophyll cells, veins, guard cells and stomata. The mesophyll cells contains spongey cells which have large gaps between each cell to allow oxygen and carbon dioxide circulation. The mesophyll cells contain palisade cells, which are located beneath the upper epidermis....   [tags: Experiment Analysis]
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2609 words
(7.5 pages)
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A Comparative Review of the Vascular System in Seed Plants and Humans - A comparative review of the vascular system in seed plants and humans In the evolutionary tree of life, all biotic organisms are believed to have derived from a common ancestor. The organisms falling under the eukaryotic kingdom of Plantae are known to have arisen in the same time period as those in the eukaryotic kingdom of Animalia—the Paleozoic era, about 500 million years ago (MYA) (Raven et al., 2008). Despite their chronological resemblance, their evolutionary diversity is especially great in their most advanced organisms—humans and seed plants....   [tags: Biology]
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(4.9 pages)
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Bioassays in Relation to the Growth and Colouration of Tomato Seedlings - ... In the experiment that was undertaken bioassays were tested to gain an understanding of how in particular copper chloride, potassium chloride and manganese chloride affect the colouration and growth rate compared to distilled water. It was known through previous research on the topic that bioassays can both be beneficial and harmful towards different plants. Hopefully by conducting this experiment it will reveal the conditions that tomato seedlings are able to survive in. Through previous research it can be hypothesised that copper chloride will have a major negative effect on the overall appearance and growth of these tomato seedlings followed by manganese chloride and potassium chloride....   [tags: Scientific Research ]
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2304 words
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Coffee Rust Fungus of the Coffea Genus - ... (Waller 1982) This may imply that both environmental monitoring and scouting play a large role in disease detection, if not control. In an extremely hot and dry season one might expect for infection levels to be at a much lower rate so control measures would be affected. Spread and Epidemiology Some old research details some conflicting issues on the topic of Coffee Rust spore dispersal, namely whether it is primarily wind or water born. Waller details a wind tunnel experiment carried out in 1960 which showed spore release at winds speeds greater than 7 miles per hour....   [tags: Agriculture]
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Lack of Genetic Diversity Amongst Bananas and Plantains - ... More hyphae then grow into the palisade tissue and continue on into other air chambers, eventually emerging through stomata. Further growth occurs before the re-entry of the hypha into the leaf through another stoma repeats the process9. This systematic destruction of the leaves can reduce fruit yields by up to 50%. In itself, the disappearance from the Western diet of bananas is sad (the average American eats 26.2 pounds of banana per year), but of little general consequence. The real problem is the prevalence of different varieties of bananas and plantains as subsistence crops through Asia, Africa and Latin America: 85% of banana production is for local consumption8....   [tags: Genetic Engineering]
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The Effect of Light Intensity on the Rate of Photosynthesis - The Effect of Light Intensity on the Rate of Photosynthesis Plan: Aim: To investigate the affect of light intensity on the rate of photosynthesis. Theory: Before I predict what will happen I must look at how photosynthesis occurs. Photosynthesis is the way plants create a source of food for themselves. Photosynthesis requires the following resources; Carbon Dioxide, Water and light. Inside the leaves of a plant there is a green substance, this substance is known as chlorophyll....   [tags: Papers] 531 words
(1.5 pages)
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Competition for Light in the Australian Tropical Rainforest - Competition for Light in the Australian Tropical Rainforest The Australian tropical rainforest is typified by a dense canopy of evergreen and deciduous trees, providing a dark environment for many plants in the understory layers and forest floor by filtering light. Light, which serves as the driving force for photosynthetic processes, affects all biological and structural aspects of the organism. The limited light availability has induced competition among rainforest plant species for this resource through structural and growth adaptations....   [tags: Photomorphogenesis Botany Essays]
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(10.4 pages)
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The Irish Potato Famine Fungus, Phytophthora infestans (Mont.) de Bary - The Irish Potato Famine Fungus, Phytophthora infestans (Mont.) de Bary The importance of the genus Phytophthora, both to humanity and to the development of the science of plant pathology, has been obvious ever since P. infestans devastated the potato crop in Western Europe in 1845. Its greatest impact was the potato blight epidemic in Ireland (Gregory 1983). In 1845 and again in 1848 a third of the potato crop was destroyed by blight, losses at the extremes of previous European experience. Even more disastrously, three-quarters of the crop failed in 1846....   [tags: Botany]
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Cyperus papyrus: From the Nile to Modern Times - Cyperus papyrus: From the Nile to Modern Times Cyperus papyrus, commonly called papyrus or paper plant, is a member of the sedge family (Cyperaceae). It is a monocot that is native to riverbanks and other wet soil areas in Egypt, Ethiopia, the Jordan River Valley, and other parts of the Mediterranean basin (1). Few members of the sedge family hold economic importance as crop plants, but throughout the world these plants hold great regional importance in weaving mats, baskets, screens, and even sandals (3)....   [tags: Botany]
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Experiment to Investigate Osmosis in Potatoes - Experiment to Investigate Osmosis in Potatoes The aim of this experiment is to investigate the movement of water in and out of plant cells. The cells chosen for study will be taken from potato tubers. Firstly I will explain what osmosis is. Osmosis is the passage of water from a region of high water concentration through a semi permeable membrane to a region of low water concentration. This definition contains three important statements: a) It is the passage of water through a semi permeable membrane b) It is the passage of water from a region of high water concentration c) It is the passage of water to a region of low water concentration....   [tags: GCSE Biology Osmosis Coursework] 2882 words
(8.2 pages)
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Investigate the Cell Sap Concentration of Solute in a Potato Chip using Osmosis - Investigate the Cell Sap Concentration of Solute in a Potato Chip using Osmosis Aim The aim of the experiment is to investigate the cell sap concentration of solute in a potato chip using osmosis and produce a figure informed by the investigation as to what this is. Background Information A factor that effects how much water moves into a cell is the solute concentration within it. Water moves in and out of cells by diffusion, this diffusion is called osmosis. Osmosis is the diffusion of water molecules from a place with a high water potential or high concentration of water to a low water potential or low concentration of water....   [tags: GCSE Biology Osmosis Coursework] 5480 words
(15.7 pages)
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Acid Rain 10 - Acid rain is exactly what it suggests- rain that is acidic. The definition of "acid rain" is rain with a pH of below 5.6. Rain becomes acidic because of gases that dissolve in the rain. Approximately 70% of acid rain is a result of dissolved sulfur dioxide (SO2) which forms Sulfuric Acid. The remaining 30% or so comes from various Nitrogen Oxides (mostly NO2 and NO3 which has collectedly adopted the mane Nox). There is also a small percentage of hydrochloric acid that makes up hydrochloric acid as well....   [tags: essays research papers] 1751 words
(5 pages)
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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
(4.5 pages)
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Feeding The Third World - Feeding The Third World Millions of people today, despite technological advances enabling fish and meat production and crop yields to soar, are still living in hunger. It is estimated that nearly 30% of the world's population suffer from some form of malnutrition, and the majority of these people live in Developing Countries. Intensive and Subsistence Farming both present possible solutions to dealing with world hunger and ending the suffering of the Third World. Intensive Agriculture, also known as Factory or Battery Farming, involves land being farmed in order to achieve the greatest yield possible with the use of inorganic fertilisers and pesticides because it is used to supply large companies and distributors....   [tags: Papers] 2902 words
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The Effect of Different Solutions on Potato and Cucumber Strips - The Effect of Different Solutions on Potato and Cucumber Strips Plan ---- Introduction Plants in the soil have their roots in a dilute solution of various mineral ions. Sometimes, the soil they are planted in gets flooded with sea water (which has an average of 0.3 sodium chloride concentration). In these cases the roots are observed to wilt and become flaccid. In my experiment, I will simulate this situation using potato and cucumber strips, placing them in different solutions (sodium chloride, glucose and sucrose) at different molar concentrations....   [tags: Papers] 1782 words
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Factors that Affect the Growth in Duckweed - Factors that Affect the Growth in Duckweed Introduction ============ For healthy growth plants need several substances. Three important mineral ions that can only be obtained from the soil through their roots are nitrates, phosphates and potassium. Nitrates are essential for making amino acids and for the 'synthesis' of proteins. Phosphates are essential as they have an important role in reactions involved in photosynthesis and respiration. Potassium is also important as it helps the enzymes involved in photosynthesis and respiration to work....   [tags: Papers] 1471 words
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The Importance of Plants on Planet Earth - The Importance of Plants on Planet Earth Plants As We See Them --------------------- Plants are all around us, renowned for their aesthetic appeal; their colours and structures lend themselves to decoration. Plants are used in celebrations and commiseration's and are often celebrated in their own right- the annual Michigan potato festival being a good example. Plants are associated with national identity. The Scottish thistle; Irish Shamrock; Welsh leeks and daffodils. Many national flags feature plants, the Cedar tree on the Lebanese flag, and the Maple leaf on the Canadian flag....   [tags: Papers] 820 words
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Investigating The Effect Of Concentration Of Salt Solution On The Mass Of Potato Chips - Investigating The Effect Of Concentration Of Salt Solution On The Mass Of Potato Chips Aim: The aim of this investigation is to see whether the amount of salt solution affects the mass of the potato chip Hypothesis: In the solution below, water will diffuse from the dilute solution into the concentrated solution through the process of osmosis. Therefore the dilute solution level will fall and the concentrated level will rise Line Callout 2: Disapproved (is unable to go through the semi permeable membrane O Line Callout 2: Approved (is able to go through the semi permeable membrane P Salt solution Water [IMAGE] When a substance such as salt dissolves in water, the substance's molecules stick with some of the water molecules, so the concentration of the water molecules decreases....   [tags: Papers] 953 words
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Investigating the Factors that Affect Osmosis in Living Tissue - Investigating the Factors that Affect Osmosis in Living Tissue Aim: To investigate the factors that effect osmosis in living tissue. Planning: Introduction Essentially, osmosis is the diffusion of water across a selectively permeably membrane. Osmosis is one of the ways by which substances enter and exit cells. Other ways include diffusion, the Donnan effect[1], solvent drag, filtration, endocytosis, exocytosis and active transport. All of these methods are necessary to provide cells with the conditions necessary for their survival....   [tags: Papers] 5450 words
(15.6 pages)
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Bouncing Ball Investigation - Bouncing Ball Investigation Aims: In This experiment, I'm going to discover how the surface affects the height that a of a tennis ball Introduction: All green plants are able to use light as a source of energy. Chlorophyll (green coloured pigment in leaves) absorbs light and changes it into chemical energy, which is used to power all the chemical reactions that go on in a plant cell. This is called photosynthesis. Photosynthesis is the process of producing glucose from sunlight, which takes place in the leaves....   [tags: Papers] 680 words
(1.9 pages)
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The Benefits and Impications of Using Fertilisers for Improving Plant Productivity To the Environment - The Benefits and Impications of Using Fertilisers for Improving Plant Productivity To the Environment In my point of view I think that fertilizers are of use to the environment in some ways but can also be potentially damaging in others. The term fertilisers is stated as " A substance usually added to soil to increase its ability to support plant growth" by Encarta. This shows that fertilisers are needed to keep soil in good conditions to allow the maximum productivity for plant growth....   [tags: Papers] 883 words
(2.5 pages)
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Investigating Plants - Investigating Plants MOST PLANTS are green because they contain the substance chlorophyll. They use it to trap light energy; this is used during photosynthesis to make food. Plants are usually anchored in a growing medium such as soil. Some, such as mosses and liverworts, are small and delicate. Others, such as the giant redwood trees, are huge. Many plants, such as marigolds and sunflowers, are annuals, which means that they live for just a year. Perennials can live for many years: some bristlecone pine trees, for example, are nearly 5,000 years old....   [tags: Papers] 2078 words
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The Importance of Diffusion to Living Organisms - The Importance of Diffusion to Living Organisms Diffusion is basically the movement of chemical species (ions or molecules) under the influence of concentration difference. The species will move from the high concentration area to the low concentration area till the concentration is consistent in the whole system. Diffusion mostly occurs in gases and liquids as these can move freely. The main features of an efficient diffusion system would be that it has a large surface area, thin membrane and a continuous supply of substances....   [tags: Papers] 733 words
(2.1 pages)
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Personal Exercise Plan - Personal Exercise Plan I am going to organise my plan and then perform a personal exercise program, the overall aims of my personal training programme are to: - 1. Improve specific and current fitness levels required for my sporting activity football e.g. Cardio vascular endurance but mainly speed. 2. To improve fitness levels so I can concentrate more on my techniques and skills without having to worry about whether I can endure a full practice session. 3. To improve the level of the standard of my performance and become more successful with my chosen sport ‘football’....   [tags: Physical Exercise Fitness Health] 3314 words
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Investigating the Growth of Pleurococcus on Tree Trunks - Investigating the Growth of Pleurococcus on Tree Trunks Factors to consider/have an effect « Type of tree « Height « Light intensity « Temperature Observations Preliminary method « On your tree, use a compass to find out which side of the tree is north. « Then place your grind against the tree trunk and count how many squares have growth on them. « Write your results down in a table and repeat for east, south and west. Preliminary results Tree number Site 1 North Site 1 East Site 1 South Site 1 West Site 2 North Site 2 East Site 2 South Site 2 West 1 25 24 4 25 9 1 12 4 7 20 11 25 13 25 13 16 18 5 22 25 22 23 5 3 0 1 4 25 20 11 13 25 13 18 16 Total 87 71 76 74 60 27 53 39 Preliminary information Pleurococcus is the most common green algae and grows on the tree trunks, poles and stonewalls....   [tags: Papers] 921 words
(2.6 pages)
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Circadian Clocks - What is a circadian clock. A circadian clock is an internal biological clock that is found in almost all organisms, which regulates many metabolic processes. This biological clock allows organisms to adjust physiologically to changes in the environment. It is also influential in an organism’s behavior based on environmental differences. What do circadian clocks regulate. In plants, circadian clocks control flowering, response to seasons, and photosynthesis such as the opening and closing of the stomata....   [tags: Biology] 1243 words
(3.6 pages)
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Investigating the Rate of Transpiration in a Mesophyte Plant - Investigating the Rate of Transpiration in a Mesophyte Plant Experiment to investigate the relationship between the number of stomatal pores on the upper and the lower surfacesof the leaves of a mesophyte plant and the rate of transpiration from those surfaces. The aim of the experiment The aim of the experiment is to investigate how the number of stomatal pores is related to the rate at which water is lost from the leaves....   [tags: Papers] 813 words
(2.3 pages)
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Impact of Global Warming on Coastal Wetlands - Impact of Global Warming on Coastal Wetlands Professor’s comment: Jane wrote this research paper for my Advanced Composition course. The assignment asks the students to read and understand six to ten articles within a research area of their choice, then synthesize the information so that a reader can quickly understand the present state of research in that area. Jane chose to look at how increased flooding and salinity might affect coastal wetland soils and species, and she organized the material clearly and effectively....   [tags: Climate Change, Greenhouse Gases] 1606 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
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Dollar Spot - ... Since the extent of the disease is contributed to the duration of the dew period any irrigation that prolongs the dew period will contribute to an outbreak of the disease (Putman et al. 2010). Night time and early irrigation are best for turfgrasses that are most susceptible to the disease (Pigati et al. 2010). If possible, never irrigate in the afternoon or early evening. Fungicides should not be necessary for the control of the disease unless the primary methods are not working (Wong, 2009)....   [tags: Agricultural Research ]
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Climate Change - Global climate change has positive and negative effects on marine and terrestrial ecosystems. The cause of global climate change is said to be because carbon dioxide is being emitted through the large scale burning of oil, coal and gas, with an additional contribution coming from clearing of tropical forests and woodlands which results in wildlife life destruction. The carbon dioxide traps heat from the sun in the earth's atmosphere and prevents it from being sent back out into space. The heat that stays trapped in the atmosphere causes the global temperature to increase....   [tags: essays research papers fc]
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Biology - Photosynthesis:Energy from the Sun Identifying Photosynthetic Reactants And Products A. The water for photosynthesis in land plants comes primarily from the soil and must travel from the roots to leaves. B. Carbon dioxide is taken in, and water and O2 are released, through tiny openings in leaves , called stromata. C.Light is absolutely necessary for the production of oxygen and carbohydrate. The photosynthetic production of oxygen by green plants is an important source of atmospheric oxygen, which most organisms –including plants themselves –require in order to complete their respiratory chains and obtain the energy for life....   [tags: essays research papers] 615 words
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Letter of Interest - Re: Research Assistant Dear Jason Geijskes, Please accept my application for the above-mentioned position as advertised on the http://seek.com.au website on 5 May 2010. My interest in working with a leading agribusiness industry together with the job responsibilities you have mentioned inspired me to apply for this position. My qualifications and skills that I believe will be important for this position are briefly discussed bellow for your kind consideration. Degree in biological science Presently I am in the final stage of PhD and I will submit my thesis on 1 Jun 2010....   [tags: Employment] 871 words
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Small-Scale Experiments and Large-Scale Predictions - ... The terrain could be of a slightly different altitude than that of the in situ site and this would cause an error in the actual mixing height and the data would be inaccurate. This prediction model is also limited in that it cannot be used effectively in all areas of the world as different regions will have a varying degree of terrain and it is impossible to accurately, with 100% certainty, predict the amount of pollution in an area by extrapolated data from similar areas. The limitations of the in situ site make this method of data collection applicable only within a certain context and geography making large scale prediction across the globe and in varying geographic regions impossible....   [tags: Scientific Method Climate Change]
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How does the concentration of sucrose affect the weight - How does the concentration of sucrose affect the weight of pieces of potato after osmosis has taken place. Aim The aim of this is experiment is to investigate how much sucrose is in a potato. We are going to investigate the effect of different concentrations of sucrose on the weights of pieces of potato after osmosis has taken place. Prediction I predict that the less concentrated the solution of sucrose is, the greater the weight of the potato will be. I predict this because osmosis is the movement of water from a region of high water concentration to a region of low water concentration through a semi-permeable membrane i.e....   [tags: GCSE Biology A2 A-Level Coursework] 3055 words
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An Investigation into Osmosis - An Investigation into Osmosis Introduction In this investigation, I am trying to find the answer to these two key questions below: 1 What are the factors that determine whether water moves in or out of the potato. 2 How does the concentration of a solution surrounding a cell affect movement in and out of cell across its semi- permeable membrane. In order to do this I will need to consider what osmosis is and make some experiments to help me investigate and find answers for the key questions....   [tags: Papers] 2765 words
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