AS, A2 and A-Level: Biology Coursework and Essays
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Potato Investigation (User Rating: 6.28 | Length: 3.0 Pages)
Potato Investigation Presented with raw potato how would you carry out an experiment to determine the concentration of the potato cell in molar strength? The experiment was set up to be as fair as possible. Then the potato chips were cut into 15 cylinders using a cork cutter and then cut to a lengt ...
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The Effect Of Varying Enzyme Concentration On The Breakdown Of Hydrogen Peroxide In The Presence Of (User Rating: 8.27 | Length: 9.1 Pages)
The Effect Of Varying Enzyme Concentration On The Breakdown Of Hydrogen Peroxide In The Presence Of Hypothesis - Hydrogen peroxide will breakdown to oxygen and water in the presence of Catalase. The reaction will increase with increasing enzyme concentration when molecules of hydrogen peroxide are ...
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A Balanced Diet (User Rating: 10.00 | Length: 9.1 Pages)
A Balanced Diet A balanced diet is one that provides an adequate intake of energy and nutrients for maintenance of the body and therefore good health. A diet can easily be adequate for normal bodily functioning, yet may not be a balanced diet. An ideal human diet contains fat, protein, carbohydrate ...
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Actions and Effects of Creatine (User Rating: 10.00 | Length: 5.2 Pages)
Actions and Effects of Creatine Throughout time, humans have had a fascination with being excellent at what they do, and athletics have been no exception. Many substances exist, and many have been criticized and analyzed for their safety, legality, and morality for athletes. With the banning of ste ...
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AIDS (Length: 7.7 Pages)
AIDS AIDS PREFACE In an extensive article in the Summer-Autumn 1990 issue of "Top Secret", Prof J. Segal and Dr. L. Segal outline their theory that AIDS is a man-made disease, originating at Pentagon bacteriological warfare labs at Fort Detrick, Maryland. "Top Secret" is the int ...
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Asthma (User Rating: 7.00 | Length: 3.6 Pages)
Asthma In America, more than 80 billion aspirin tablets are consumed each year. Aspirin is a trade name for acetyl salicyclic acid and is effective as an analgesic, antipyretic, and anti-inflammatory drug. History Aspirin's predecessors, derivatives of salicylic acids, have been used to treat a ...
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Biological Importance of Water (User Rating: 6.88 | Length: 4.5 Pages)
Biological Importance of Water Water is essential to life itself, with out water life on earth would not exist. Water is a major component of cells, typically forming between 70 and 95% of the mass of the cell. This means that we are made from approximately 80% water by mass and some soft bodied cr ...
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Chalk Grasslands (User Rating: 7.00 | Length: 1.2 Pages)
Chalk Grasslands ` Chalk is an almost pure form of calcium carbonate, while limestone is more impure. Both produce soils which are alkaline, pH ranging from about 7.4-8.5 and are colonised by a diverse range of lime-tolerant plant species (calcicoles). Another feature of downland, particularly chal ...
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Chalkland Ecology (User Rating: 6.13 | Length: 2.7 Pages)
Chalkland Ecology Aim To establish whether there is a significant difference between species diversity and abundance on anthills and on open pasture. Hypothesis There will be a significant difference between the occurrence and diversity of certain species on anthills and on pastures. There will be ...
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Creutzfeldt-Jakob disease (User Rating: 10.00 | Length: 1.7 Pages)
Creutzfeldt-Jakob disease Rare fatal degenerative disease of the central nervous system. Creutzfeldt-Jakob disease occurs throughout the world at an incidence of one person in a million; however, among certain populations, such as Libyan Jews, rates are somewhat higher. The disease commonly arises ...
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Did Jenner really make a breakthrough in the fight against disease? (Length: 1.2 Pages)
Did Jenner really make a breakthrough in the fight against disease? In the 18th century, medical knowledge was still quite basic with very few advances since the middle-ages. The biggest advances had come from Versailles, Pare and Harvey, but these advances were just in knowledge of the human body, ...
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Drugs (User Rating: 7.00 | Length: 2.4 Pages)
Drugs Cannabis is illegal in most countries, but it is still the most commonly used drug in Britain. It is obtained from the hemp plant and is produced in three different forms: marijuana, which is dried to a tabacco- like substance and smoked; cannabis resin, which is known as hashish or hash; and ...
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Ecological Succession (User Rating: 8.33 | Length: 3.6 Pages)
Ecological Succession Succession is "A sequence of ecological changes in an area whereby one group of plant or animal species successively gives way to another, culminating in a climax community." This succession occurs in a number of sereal stages. A sere is a stage in a sequence of even ...
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Effect of Enzyme Concentration (User Rating: 7.00 | Length: 6.2 Pages)
Effect of Enzyme Concentration For this investigation I am going to investigate the effect of the concentration of an enzyme, in this case Amylase, on the time taken for the enzyme to fully breakdown the substrate, which in this case is starch. The reason why these two enzymes have to be used is be ...
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Effect of indoleacetic acid on the elongation of coleoptiles and roots (Length: 4.4 Pages)
Effect of indoleacetic acid on the elongation of coleoptiles and roots Aim To investigate the effect of different concentrations of indoleatic acid upon the elongation of the coleoptiles and roots of a germinating seed. Method 1. Prepare five labelled petri dishes with lids filling them with the fo ...
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Effect of Substrate Concentration on Catalase. (User Rating: 7.08 | Length: 4.0 Pages)
Effect of Substrate Concentration on Catalase. Aims This is an experiment to examine how the concentration of the substrate Hydrogen Peroxide (H2O2) affects the rate of reaction of the enzyme Catalase. Background Information Enzymes such as Catalase are protein molecules, which are found in living ...
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Enzyme Technology (User Rating: 5.00 | Length: 3.3 Pages)
Enzyme Technology The food and drink industry depends heavily on enzymes. Enzymes produced by yeast have been used for thousands of years in brewing and baking. High fructose syrup contains fructose and glucose in roughly equal proportions. The high fructose syrup is greater in demand than pure glu ...
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Enzymes (User Rating: 5.00 | Length: 3.4 Pages)
Enzymes Enzymes The majority of the reactions that occur in living organisms are enzyme-controlled. Without them, the rate of the reactions would be so slow as to cause serious, if not fatal, damage. Without enzymes toxins would soon build up and the supply of respiratory substrate would decrease. ...
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Evolution (Length: 10.5 Pages)
Evolution ` We act like animals, we eat like animals, and we are animals. The many theories of evolution such as Darwin's theory of evolution prove to us that we choose to believe that we are not animals when we really are. Evolution is the sequencial process of change over periods of time, whi ...
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Exchanges with the environment (User Rating: 1.00 | Length: 0.9 Pages)
Exchanges with the environment Gas Exchange in Animals In Humans this occurs in the lungs located in the thorax or chest cavity. The windpipe or trachea splits at its base into two principal bronchus these then subdivide into lobes, which in turn subdivide into bronchioles and then terminate in alv ...
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Exotic Diseases (User Rating: 9.00 | Length: 8.6 Pages)
Exotic Diseases Exotic diseases are one of the greatest threats to humanity. In a world where so many things are overlooked, diseases and epidemics are clearly overlooked and underestimated far more than any threat of nuclear war, global warming, or any comet headed for earth. Throughout history ep ...
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Experiments which explain photosynthesis (User Rating: 1.00 | Length: 2.7 Pages)
Experiments which explain photosynthesis Colours Chloroplasts contain several different pigments the majority of which are chlorophyll a and chlorophyll b. Both of these types of chlorophyll absorb similar wavelengths of light, but chlorophyll a absorbs a slightly higher wavelength than chlorophyll ...
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Explain what is meant by the term homeostasis (User Rating: 8.50 | Length: 4.9 Pages)
Explain what is meant by the term homeostasis p>Outline how the nervous system is involved in any one homeostatic function. [12] c) Evaluate the involvement of the nervous system in this homeostatic function. [12] Homeostasis is involved in keeping the body's internal environment constant (l ...
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Explain with aid of a diagram the working of the electron microscope (User Rating: 9.00 | Length: 3.7 Pages)
Explain with aid of a diagram the working of the electron microscope The diagram below shows a picture of an electron microscope. This is a type of microscope that makes use of a beam of electrons rather than visible light. Because the wavelength of electrons is much smaller than the wavelength of ...
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Fresh water Ecology (User Rating: 9.00 | Length: 4.0 Pages)
Fresh water Ecology The nature of all aquatic environments depends upon the following factors which exert their effects in varying degree: i) The depth of water Has an important secondary effect by reducing the penetration of light and hence the degree of colonisation by plants. ii) Light Water abs ...
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