Biology Essays Examples For College & High School Students in PDF

10822 total results

The Features of the Process of Photosynthesis (1492 words, 4 pages)

Photosynthesis is a very important process in nature. It is the production of energy in the form of glucose involving water from the soil, carbon dioxide from the air and light energy. It takes place in all green plants, which use the green chlorophyll, held in chloroplasts in the leaves, ... Read More

Osmosis According to Encarta Encyclopedia 97 (1019 words, 3 pages)

Planning Osmosis is when water passes from a area of high water concentration (a dilute solution) through a semi-permeable membrane to an area of low water concentration (a concentrated solution). According to Encarta Encyclopaedia 97, osmosis is the flow of water by diffusion through a differentially permeable membrane from areas ... Read More

Cellulose as the Basic Structural Component of Plant Cell Wall (1080 words, 5 pages)

Properties of Cellulose Cellulose is a complex carbohydrate, or polysaccharide consisting of 3,000 or more glucose units. The basic structural component of plant cell walls, cellulose comprises about 33 percent of all vegetable matter (90 percent of cotton and 50 percent of wood are cellulose) and is the most abundant ... Read More

How Blood Glucose Changes While Fasting (3506 words, 4 pages)

How is the blood glucose changes while fasting? - A comparison between a diabetic and a non-diabetic male student Abstract The research question of my Extended Essay is "How is the blood glucose changing while fasting - a comparison between a diabetic and a non-diabetic male student." I am a ... Read More

Creating a Diagram of Water’s Electron Structure (1464 words, 2 pages)

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 ... Read More

A Biography of Gregor Mendel, an Augustinian Monk (1317 words, 2 pages)

Gregor Mendel was an Augustinian nineteenth century monk who, due to a series of momentous experiments, is now widely regarded as the forefather of genetics. Mendel studied the inheritance of seven contrasting characteristics of the species Pisum sativum, more commonly known as the garden pea. Each of the variables that ... Read More

The Effect of Temperature on a Plasma Membrane on a Typical Plant Cell (1185 words, 2 pages)

effecyThe Effect Of Temperature On A Plasma Membrane Aim This experiment aims to determine what effect an increase in the surrounding temperature has on the plasma membrane of a typical plant cell structure. HypothesisAn increase in temperature will damage and denature the plasma membrane and cause the cytoplasm and other ... Read More

A Studies of Agencies (2193 words, 3 pages)

Founded by Sir Francis Galton, eugenics was described as "the study of agencies under social control that may improve or impair the racial qualities of future generations either physically or mentally". Galton was specifically concerned with the heredity of mental powers, and how this inheritance could therefore be manipulated. Coming ... Read More

The Importance If the Schema Idea to Emerging Discipline of Cognitive Science (2056 words, 3 pages)

The schema idea is of central importance to the emerging discipline of cognitive science. Schema-like concepts have, however, been present for a long time in cognitive psychology and can even be detected in Kant's (1787) notion of a priori structures of the mind. Basically schema theories are theories about knowledge ... Read More

An Overview of What Molecular Psychology Entails (2187 words, 3 pages)

"In a generation's time most of the researchers in psychology departments will be working on molecular psychology." Francis Crick, 7th European Conference on Visual Perception. Reduction refers to the explanation of a theory by a more basic, fundamental one. It is best exemplified by the unification and increased coherence made ... Read More

Space and Time Are Basic Categories of Human Existence (2485 words, 3 pages)

'Space and time are basic categories of human existence' (Harvey, 1989 201). They are such familiar concepts to human beings that there is a temptation to dismiss them as unimportant. Time is used everyday - ordered into minutes, hours, days, even millenia - while space is treated as a fact ... Read More

An Experiment of Correlation Between Rate of Respiration of Glucose by Yeast in Biology (3472 words, 17 pages)

Harry Fox 11ST BiologyScience 1 - Strand 1 Planning Aim In my experiment, my aim is to find out any correlationbetween rate of respiration of glucoseby yeast and the mixtures temperature. I shall do this by conducting anexperiment which will involve the timing of the yeast, water and glucose whichhas ... Read More

An Essay on Eukaryotic Organelles (328 words, 1 pages)

Essay of Eukaryotic Organelles 10196 The mitochondria has an eggshape structure. The mitochondria consists of an inner and outer membrane. The outer membrane is what shapes the organelle to its egglike shape. The inner membrane which folds inward makes a set of "shelves" or cristae that allow the reactions of ... Read More

An Overview of Theories Explaining Biological Evolution (8773 words, 11 pages)

TABLE OF CONTENTS Page INTRODUCTION ............................................... 2 DARWINIAN THEORY OF EVOLUTION .............................. 4 THE THEORY OF BIOLOGICAL EVOLUTION CONTRIBUTING ELEMENTS ....................... 7 WALLACE'S CONTRIBUTIONS ................................... 13 HARDY-WEINBERG PRINCIPLE .................................. 15 COMPARISON LAMARCK vs. DARWIN ........................... 16 DARWIN'S INFLUENCES ....................................... 20 METHODS OF SCIENTIFIC DEDUCTION ........................... 23 LIMITS TO DARWIN'S THEORY ... Read More

An Examination of the Range of Biochemical Pathways and Mechanisms Used by Living Organisms (1724 words, 10 pages)

In this essay I aim to describe the range of biochemical pathways andmechanisms used by living organisms both to detect and to emit light. I will discuss general principles employed,and illustrate the range of different biochemistry involved by the use of manyspecific examples.Light Detection I will discuss the mechanism and ... Read More

The Discovery of Transformation and Evidence for DNA as the Genetic Code (1151 words, 5 pages)

Evidence for DNA as the genetic code The discovery of transformationby Griffith in 1928 started them idea that genetic material is nucleic acid. The bacterium Pneumococcuskills mice by causing pneumonia. The virulence of thebacterium is determined by the capsular polysaccharide, a component of the cellsurface that allows the bacterium to ... Read More

An Introduction to Wind Energy One of the Most Quickly Developing Sources of Energy in the UK (621 words, 3 pages)

WIND ENERGY Windenergy is one of the most quickly developing sources of energy in the UK. InNorthern Ireland alone, there are now 12 sites with wind-powered generators inaction. Power ratings can vary from a few kilowatts to several megawatts. Alarge wind-farm (10 -25 machines) can produce enough electricity for around6000 ... Read More

An Analysis of the Topic of the Life Science (530 words, 1 pages)

GUT ISSUES Life Sciences SIG ----------------------------------------------------- We share many experiences with the kings of old pastries, for instance, and home entertainment and vacation trips to far-off lands. Ancient-day common folk knew nothing of such things. Then again, they weren't constipated... We are. Not all of us, of course. But enough ... Read More

How People Employ the Use of Logic to Help Them Clarify or Solve Problems (1487 words, 7 pages)

Everyday people employ the use of logic to help them clarify or solveproblems. Logic may only provide validity or highly probable ideas, but thecorrect answer, if any, is left for one to decide. The science of thinking andrationalizing, logic is like a double-edge sword. When logic is utilized it maybecome ... Read More

An Analysis of the Intensity of Light Affect on the Rate of Photosynthesis in a Plant (2870 words, 13 pages)

Biology CourseworkAim The aim ofmy experiment was to determine whether or not the intensity of light wouldaffect the rate of photosynthesis in a plant. To do this, I placed a piece ofCanadian pondweed in varying light intensities, and observed the amount ofoxygen being given off. I used Canadian pondweed because ... Read More

An Analysis of the Potato Tissue’s Mass Difference When Placed in Different Concentrations of Sugar Solutions (3533 words, 17 pages)

Planning My aim for this experiment is to see the results ofpotato tissue's mass difference, when placed in different concentrations ofsugar solutions. Variablesinvolved For this experiment I would expect to have 3different variables, Independent, Dependent, and fixed variables, which allhelps me to plan and explain the experiment thoroughly. TheIndependent variable ... Read More

An Analysis of the Difference Species Diversity and Abundance (820 words, 4 pages)

Aim Toestablish whether there is a significant difference between species diversityand abundance on anthills and on open pasture.Hypothesis Therewill be a significant difference between the occurrence and diversity ofcertain species on anthills and on pastures. There will be a greater percentageof plant life on the pasture and there will a ... Read More

An Analysis of the Effects of Different Concentrations of Indoleatic Acid upon the Elongation of the Coleoptiles and Roots of a Germinating Seed (1347 words, 6 pages)

Aim Toinvestigate the effect of different concentrations of indoleatic acid upon theelongation of the coleoptiles and roots of a germinating seed. Method 1.Prepare five labelled petri dishes with lids filling themwith the following solutions (a) 2 per cent sucrose plus 100mg dm3IAA (b) 2 per cent sucrose plus 1.0mg dm3IAA ... Read More

Definitino and Factors That Affect the Rate of Photosynthesis in Elodea (1384 words, 6 pages)

Investigation into the factors thataffect the rate of photosynthesis in Elodea Introduction Photosynthesis is the chemicalprocess, which takes place in every green plant to produce food in the form ofglucose. Plants use the suns energy tojoin together water and carbon molecules to make the glucose, which is sentaround the plant ... Read More

A Study on Enzymes (1027 words, 5 pages)

Enzymes Themajority 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 supplyof respiratory substrate would decrease.Enzymes are proteins and thushave a specific shape. ... Read More

Types of Chlorophyll That Absorbs Similar Wavelengths of Light (819 words, 4 pages)

Colours Chloroplasts contain several different pigments the majorityof which are chlorophyll a andchlorophyll b. Both of these types ofchlorophyll absorb similar wavelengths of light, but chlorophyll a absorbs a slightly higher wavelengththan chlorophyll b. Neitherchlorophyll absorbs much light in the green region of the spectrum thus makingit appear green. This ... Read More

Osmosis is the Spontaneous Net Movement of Solvent Molecules Through a Semi-Permeable Membrane Into a Region of Higher Solute Concentration (361 words, 2 pages)

Planning Osmosis is the netmovement of water molecules from a region of their higher concentration througha partially permeable membrane. This movement usually takes place through amembrane which is permeable to water but not to solutes.In my investigation I am going to be investigate thefactors affecting the rate of Osmosis. Some ... Read More

Enzymes Speed up the Biological Catalysts and Are Specific to a Certain Reaction (672 words, 4 pages)

Enzymesare biological catalysts. Theyspeed up biological reactions and like enzymes are not used up.Theyare specific to a certain reaction.Ihave been asked to design an experiment that investigates one factor thataffects the rate of an enzyme.Whenhydrogen peroxide is placed on liver (the substrate) it froths (makesO2)(H202H20O2)Possibleinput variablesTheseare the things that I ... Read More

Etymology and Theory of Eugenics (3128 words, 16 pages)

Eugenicsis the science which deals with all influences that improve the inbornqualities of a race also with those that develop them to the utmost advantage1. The word eugenics wasderived from a Greek root meaning good in birth or noble heredity. Darwins Originof the Species initiated eugenics in Europe and spiked ... Read More

The Importance and Effect of Doing the Breathing Rate Experiments (496 words, 2 pages)

The peopledoing the breathing rate experiments are doing the experiment to see how fiteach person is. They do this by timing how long it takes for their breathingrate to get back to their normal rate (the rate it was at before they startedto do the exercise). The method they stated ... Read More

Biology Essay Examples