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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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Respiration of Plants - Respiration of Plants Both plants and animals respire, but plants respire at a considerably lower rate than animals. Although in photosynthesis large amounts of gas is exchanged, leaves are adapted to control this situation. All cells in a plant respire, as it is necessary to break down glucose in order to release energy and therefore carbon dioxide. Leaves [IMAGE]In leaves, gas exchange (and loss of water vapour in transpiration) occurs through pores call the stomata, or if a singular pore, a stoma....   [tags: Papers] 342 words
(1 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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Osmosis - Osmosis Plan An introduction to osmosis. The movement of water molecules from a high concentration of water molecules to a lower concentration of water molecules through a partially permeable membrane is called Osmosis. Under normal conditions, the concentration of water molecules and salts is the same in both cells and plasma. After sweating, water and salts are lost from the plasma and there is a lower concentration of water in the plasma than inside the cells. Water molecules therefore diffuse out from the cells through the cell membrane....   [tags: Papers] 1446 words
(4.1 pages)
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Exploring Gas Exchange in Different Organisms - Exploring Gas Exchange in Different Organisms Gas exchange in mesophytes Gases enter and leave plants mainly through the stomata in the leaves and the lenticles in stems. The main gas exchange surface is the spongy mesophyll layer found inside the leaves.. The spongy mesophyll cells are loosely packed thus increasing the surface area for gas exchange. Gases are needed for both respiration and photosynthesis. The spongy mesophyll layer is specially adapted for gas exchange. The cells are coated in a layer of water in which gases can dissolve....   [tags: Papers] 1398 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: Papers] 457 words
(1.3 pages)
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The Transport of Water from the Soil to the Air Via a Plant - The Transport of Water from the Soil to the Air Via a Plant Vast amounts of water pass through plant cells. Water starts off in the soil. It is absorbed from the soil by the root hairs by osmosis. Root hairs have a cell membrane with a high surface area to volume ratio to efficiently absorb water, mineral ions and oxygen and excrete carbon dioxide. Root hairs project into the soil particles, which are surrounded by soil water at high water potential, compared to the low water potential of the content of the root hairs....   [tags: Papers] 621 words
(1.8 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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Water and Its Route Into and Through Plants - Water and Its Route Into and Through Plants · Water enters through the root hair cells and then moves across into the xylem tissue in the centre of the root. · Water moves in this direction because the soil water has higher water potential, than the solution inside the root hair cells. · This is because the cell sap has organic and inorganic molecules dissolved in it. · The root hairs provide a large surface area over which water can be absorbed. · Minerals are also absorbed but, as you should be able to work out, their absorption requires energy in the form of ATP because they are absorbed by active transport....   [tags: Papers] 518 words
(1.5 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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How Light Intensity Affects the Rate of Photosynthesis - How Light Intensity Affects the Rate of Photosynthesis Aim: The aim of this investigation is to determine whether light intensity affects the rate at which plants photosynthesise. Introduction/Prediction: All living things need food to survive. Photosynthesis is the chemical process, which takes place in every green plant to produce glucose, the plants food supply. Glucose is used for many different things in the plant; it can be combined with nitrates from the soil to make amino acids, which then in turn can be used to make proteins....   [tags: Papers] 2118 words
(6.1 pages)
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The Effect of Light on Photosynthesis - The Effect of Light on Photosynthesis Introduction ============ Photosynthesis is the process plants use to produce their own food, turning Carbon Dioxide and water into glucose and oxygen. This process can be explained using the formula: Sunlight 6CO2+6H2O C6 H12 O6 +6O2 In this piece of coursework I am going to find out how light affects the rate of photosynthesis. The energy from sunlight is absorbed into the plant by a green chemical called chlorophyll, which is found in chloroplasts in the plant's cells....   [tags: Papers] 1741 words
(5 pages)
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The Effect of Light Intensity on Photosynthesis - The Effect of Light Intensity on Photosynthesis This coursework is about photosynthesis. It will tell you about how the brightness of light (light intensity) affects the rate of photosynthesis. To find out this information I looked at the factors that are light, temperature, water and carbon dioxide. I'll choose to look at light intensity because it is something that we can control. The key variables are light and oxygen. In my experiment I will change light. However I will keep the other factors constant because it will not be a fair test and I will not know what the affect of light is on photosynthesis....   [tags: Papers] 948 words
(2.7 pages)
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Investigating the Factors that Affect the Rate of Photosynthesis - Investigating the Factors that Affect the Rate of Photosynthesis What is photosynthesis. Photosynthesis is the process in green plants and certain other organisms by which carbohydrates are synthesised from carbon dioxide and water using light as an energy source. Most forms of photosynthesis release oxygen as a by-product. The Chemical equation for photosynthesis is: 6H2O + 6CO2 ----------> C6H12O6+ 6O2 Six molecules of water plus six molecules of carbon dioxide produce one molecule of sugar plus six molecules of oxygen....   [tags: Papers] 2784 words
(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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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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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 Differing Water Potentials on the Mass or Volume of Potato Tissue - The Effect of Differing Water Potentials on the Mass or Volume of Potato Tissue An investigation into the effect of differing water potentials on the mass or volume of potato tissue, with the final aim to discover the water potential of potato tissue. Plan ==== The purpose of this experiment is to investigate the affect differing water potentials have on the mass or volume of potato tissue, with the final aim to discover the water potential of potato tissue....   [tags: Papers] 3334 words
(9.5 pages)
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Investigating the Link Between the Rate of Photosynthesis and Light Intensity - Investigating the Link Between the Rate of Photosynthesis and Light Intensity Introduction The aim of my investigation is to see if different distances of light affect the rate at which a plant photosynthesises. To do this, I am going to conduct an experiment which will involve putting some pondweed into a test-tube of water and using a lamp to alter the light intensity. I will be able to measure how fast photosynthesis is taking place (the reaction rate) by counting the oxygen gas bubbles given off....   [tags: Papers] 1265 words
(3.6 pages)
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Rate of Photosynthesis Investigation - Rate of Photosynthesis Investigation Aim I plan to investigate how light intensity and the concentration of carbon dioxide affects the rate of photosynthesis. I will be measuring the rate of photosynthesis of a Canadian pond weed elodea by counting the amount of air bubbles given off by three strands of elodea as I increase the light intensity and concentration of carbon dioxide. Apparatus - Elodea - Stand - Ruler - Stopwatch - Lamp - Water - Thermometer - Funnel - Sodium bicarbonate - Distilled water Method Photosynthesis is a chemical reaction occurring in the leaves of green plants....   [tags: Papers] 2271 words
(6.5 pages)
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Factors that Affect the Rate of Photosynthesis - Factors that Affect the Rate of Photosynthesis Aim: To investigate a factor that affects the rate of photosynthesis. Outline: A piece of pondweed will be cut and placed into a beaker containing water and sodium hydrogen carbonate. A lamp will be shined on to the pondweed and the amount of bubbles released from the plant will be counted. The lamp will be adjusted to different distances from the plant to try and obtain different results....   [tags: Papers] 4455 words
(12.7 pages)
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Investigating the Loss of Water From Leaves Through Transpiration - Investigating the Loss of Water From Leaves Through Transpiration Aim of this experiment: I am doing this experiment to investigate the loss of water from leaves through transpiration. I am going to use six privet stems with different amounts of leaves on them to see how the rate of transpiration is affected. Background knowledge: Transpiration is the loss of water from a plant. It is caused by evaporation of water from inside the leaves. Most of the action involves the stomata....   [tags: Papers] 730 words
(2.1 pages)
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Photosynthesis - Photosynthesis The leaves are the part of a plant where most photosynthesis takes place. If you cut a leaf in half and look at the cut end, it would look like this: Key: 1. Waxy cuticle: this gives the leaf a waterproof layer, which lets in light. 2. Upper epidermis: provides an upper surface. 3. Palisade cells: contain chloroplasts. 4. Spongy mesophyll: collection of damp, loosely packed cells. 5. Lower epidermis: layer of cells on the lower surface. 6. Air space inside the leaf: allows contact between air and moist cell surfaces....   [tags: Papers] 2598 words
(7.4 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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Investigating Abundance of Ranunculus Repens and Ranunculus Bulbosus - Investigating Abundance of Ranunculus Repens and Ranunculus Bulbosus 1 x quadrat Ball of string 2 x pegs 1 x hammer Key sheet to aid identification of species, e.g. Ranunculus Repens looks like this:[IMAGE] It has creeping runners and grows low to the ground Ranunculus Bulbosus looks like this:[IMAGE] It has sepals beneath the petals that are bent back and a ridged stalk with a bloated stem 10 x small pots and corresponding caps 10 x spoons Paper Pen 1 x sieve 1 x measuring cylinder 1 x weighing scales 10 x petri dishes Oven gloves 10 x test tubes Water 10 x pieces of litmus paper Paper Pen Aim To plan a fair investigation that will show how abiotic factors such as water content of soil and soil pH effects the distribution and abundance of Ranunculus Repens and Ranunculus Bulbosus....   [tags: Papers] 855 words
(2.4 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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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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Effects of Surface Area to Volume Ratios on Organisms Interaction with their Environments - Effects of Surface Area to Volume Ratios on Organisms Interaction with their Environments ‘Surface area: volume ratios of living organisms and their effects on exchanges with the environment’. All living organisms have to exchange materials through their exchange surfaces with its environment. This is because organisms require the exchange of respiratory gases, carbon dioxide and oxygen, and also the intake of food as well as the disposal of waste. The amount of materials an organism needs depends on its volume....   [tags: Papers] 567 words
(1.6 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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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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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
(8.3 pages)
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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
(4.2 pages)
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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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Investigation of Photosynthesis in Elodea - Investigation of Photosynthesis in Elodea Purpose: The purpose of this investigation is to determine the effects of varying light on the rate on photosynthesis. Hypothesis: =========== I predict that if the light intensity increases the rate of the reaction will increase at a proportional rate until a certain level is reached, the rate of increases will then go down. Eventually a level will be reached where increasing the light intensity will have no more effect on the rate of reaction as there is some other limiting factor....   [tags: Papers] 1073 words
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The Functions and Processes of Respiration and Photosynthesis - The Functions and Processes of Respiration and Photosynthesis Respiration Glycolysis The first part of cell respiration can take place without oxygen, outside of the mitochondria. This set of reactions breaks the glucose molecule in half to form two new molecules called pyruvic acid or pyruvate. This releases only a very small amount of the energy trapped in the glucose molecule enough to make only four ATP molecules. It also requires the energy from two ATP molecules to get started so there is only a net increase of two ATP molecules after glycolysis is completed....   [tags: Papers] 836 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
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Intensity's Effect on Photosynthesis - Intensity's Effect on Photosynthesis The prediction which was made before carrying out an experiment to find out how light intensity affects photosynthesis goes as follows; "Doubling the surface of the plant will double the amount of photosynthesis. And if the amount of light intensity is doubled, the amount of photosynthesis doubles, until photosynthesis cannot go any faster for that surface area or amount of light. The rate of increase will then slowly decrease until it's constant." There are four factors which affect the rate of photosynthesis....   [tags: Papers] 945 words
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Investigating the Movement of Water Into and Out of Plant Cells by Osmosis - Investigating the Movement of Water Into and Out of Plant Cells by Osmosis The aim of this experiment is to investigate the movement of water into and out of plant cells by osmosis. The cells chosen for study will be taken from potato tubers as they provide a ready supply of uniform material. Background Information Any substance dissolved in water is called a solute; a solvent is a liquid that is able to dissolve another substance, (a solute), to form a solution. The water content of plants varies depending on environmental conditions....   [tags: Papers] 953 words
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Investigating How Light Intensity Affects the Rate of Photosynthesis - Investigating How Light Intensity Affects the Rate of Photosynthesis The aim of this activity is to observe and justify how the amount of light intensity exposed to a plant affects the amount of photosynthesis the plant performs. I am trying to investigate the affect of light intensity on photosynthesis on a plant. My hypothesis is that as the light intensity on the plant increases, the photosynthesis the plant performs will also rise proportionally. However I also hypothesize that when a certain level of light intensity is reached, the rate of increase will itself decrease....   [tags: Papers] 2191 words
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Life In the Deserts - Life In the Deserts [IMAGE]Any large region where the annual rainfall is less than 10 inches (250mm) is a desert. This means that deserts have almost no water. Deserts are usually windy, but not necessarily hot, rocky and sandy, which they usually are. Like the Gobidesert, the temperature there are under freezing for 6 months of every year. But hot deserts have an unbearable climate, with approximately 40 degrees Celsius in the day, the temperature will drop to freezing point at night....   [tags: Papers] 1661 words
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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
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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
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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
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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: Papers] 3314 words
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The Movement of Water, Ions and Organic Solutes in Plants - The Movement of Water, Ions and Organic Solutes in Plants Green plants can deceive. As we bustle past them in their hundreds, on our way to school or work, we see them standing in formation or swaying in the breeze in peopleÂ’s front gardens and they could be mistaken for very idle organisms. However, we couldnÂ’t be more wrong – as transport vessels, plants are busy all the time; they transport the products of photosynthesis (mainly sucrose) all over their internal surface and amino acids, water, ions and other solutes travel from the roots, upwards....   [tags: Papers] 2477 words
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Investigating the Effect of Different Coloured Light on the Rate of Photosynthesis - Investigating the Effect of Different Coloured Light on the Rate of Photosynthesis In this piece of coursework I will be investigating the affect of different coloured light on the rate of photosynthesis. Theory-: Green plants make their own food by a process called photosynthesis. Photosynthesis occurs only in the presence of. Photosynthesis takes place mainly in leaves and depends on an important green pigment called chlorophyll, which is found in chloroplasts. To obtain the most sunlight as possible, leaves have a large surface area and the more sunlight the plant receives, the better it can photosynthesize....   [tags: Papers] 1516 words
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Investigating the Relationship Between the Width of the Footpath People Are Given and the Amount of Damaged Vegetation - Investigating the Relationship Between the Width of the Footpath People Are Given and the Amount of Damaged Vegetation Aim: - to see if whether there is a relationship between the width of the footpath which people are given and the amount of damaged vegetation. Footpath width Rank 1 Veg cover % Rank 2 D(R1R2) D2 4 3 70 4 -1 1 1.5 6 95 2 4 16 6.5 1 15 6 -5 25 4 3 100 1 2 4 6 2 40 5 -3 9 3.5 5 85 3 2 4 Total D2 59 My scatter graph shows a clear negative correlation relationship between the percentages of ground cover to the footpath width....   [tags: Papers] 2628 words
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Investigating Factors Which Affect the Rate of Photosynthesis in a Pond Plant - Investigating Factors Which Affect the Rate of Photosynthesis in a Pond Plant An Experiment Investigating the Factors Affecting Photosynthesis in Canadian Pondweed The experiment I am going to investigate involves exploring the effect certain limiting factors have on the rate of photosynthesis in Canadian pondweed. The formula for photosynthesis is as follows: 6CO2 + 6H2O = 6O2 + C6H12O6 Photosynthesis is the process in which green plants make use of the energy in sunlight to manufacture carbohydrates from carbon dioxide and water in the presence of chlorophyll....   [tags: Papers] 1196 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
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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
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Seed Germination - ... The seed therefore needs to absorb water in order to become active and begin germinating. (Yahya,H, 2010, The Miracle in the seed, accessed 13 march 2010, http://www.harunyahya.com/books/science/seed/seed6.php). If a plant is watered with a small amount of water they weaken, which happens when they loose water faster than they gain it from the soil. Before the plant begins to loose strength the stomata pores close up which helps keep the water inside but allows less carbon dioxide to enter the plant....   [tags: Experiment Analysis]
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Different wavelengths of light affect on photosynthesis rates in tomato plants - ... Plants can absorb a number of different length light waves, although not all of them are equal in power or energy which influences a plants growth. Plants absorb both red and purple light waves, however because purple wavelengths are shorter, they contain more energy. The implication of wavelengths having an adverse effect on photosynthetic rates in plants greatly benefits both the home gardener and farmer to enhance crop growth. With the knowledge that certain wavelengths stimulate increased photosynthetic rates in a shorter period of time, the home gardener or farmer would be able to yield greater quantities of plant crops in a shorter period of time....   [tags: Experiment Analysis]
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A Comparative Review of the Vascular System in Seed Plants and Humans - ... At the root, pressure forms when ions from the soil enters the tissue and thus through osmosis water is drawn inside. Once the water is drawn inside, capillary action takes over and water is moved up the length of the plant (Raven et al., 2008). Phloem constitutes main plant tissue specialized for food conduction. Phloem consists of live cells that form clusters; the main cells of phloem tissue include sieve cells, sieve tube members, and companion cells. While xylem transports water and nutrients that generally originate at the roots, phloem transports food (in the form of sugars), hormones, and mRNA which generally originate in the leaf of the plant....   [tags: Biology]
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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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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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