Biology Essays Examples For College & High School Students in PDF

10822 total results

An Understanding of an Electromagnet (1244 words, 2 pages)

BACKGROUNDAn electromagnet is a device in which magnetism is produced by an electric current. British electrician, William Sturgeon invented the electromagnet in 1825. The first electromagnet was a horseshoe-shaped piece of iron that was wrapped with a loosely wound coil of several turns. When a current was passed through the ... Read More

A Study of Electron Deflection (1682 words, 2 pages)

ROOP KANWALJIT KAURPHYSICS 0412TH MARCH, 2008 ELECTRON DEFLECTION IntroductionA beam of moving electrons can be deflected in horizontal or vertical direction by the application of electric or magnetic field. In this experiment, first the deflection of the electron beam was measured systematically as a function of the voltage differences across ... Read More

The Origin and History of Electricity (588 words, 1 pages)

Electricity was first researched by Thales of Miletos around 600BC. He conducted a few experiments on static electricity in which he believed that friction made amber become magnetized. Other than the fact that people knew that eels produced electric shocks, electricity was little more than an intellectual curiosity for over ... Read More

A Study of the Life of Albert Einstein (535 words, 1 pages)

He was the embodiment of pure intellect, the bumbling professor with the German accent, a comic clich in a thousand films. Instantly recognizable, like Charlie Chaplin's Little Tramp, Albert Einstein's shaggy-haired visage was as familiar to ordinary people as to the matrons who fluttered about him in salons from Berlin ... Read More

A Study of the Effects of Wavelength and Light Intensity on Photosynthetic Activity (1932 words, 3 pages)

Effects of Wavelength and Light Intensity on Photosynthetic ActivityABSTRACTThe photosynthetic process of eukaryotes revolves around chlorophyll, the substance that give plants their green color. Plants convert light energy into chemical energy by means of photosynthesis. This experiment tests the reaction rates of a chloroplast suspension against variables of wavelengths and ... Read More

A Description of the Living Organisms Catabolize Organic Molecules Within Their Cells (391 words, 1 pages)

Living organisms catabolize organic molecules within their cells and use the energy released to manufacture ATP by phosphorylating ADP. Many prokaryotes and virtually all Eukaryotes phosphorylate ADP either through fermentation (anaerobic) or respiration (aerobic). Both of these processes involve oxidation of foodstuffs, yet only the latter requires oxygen.Cellular respiration is ... Read More

The Effects of Osmosis on Potato Chips (686 words, 1 pages)

Effect Of Osmosis On Potato ChipsOsmosis is a special kind of diffusion involving the movement of water through a semi permeable membrane, separating solutions of different concentrations. The water passes from a region of high concentration to a region of low concentration until the two concentrations are equal in water. ... Read More

A Study of Sedimentary and Metamorphic Rocks (402 words, 1 pages)

Sedimentary and Metamorphic rocksRocks formed when sediments are cemented or compacted once these sediments are deposited.Constitutes about 5 of the Earths crust.Many of these rocks also contain fossils.Many of these rocks are important economically. (Energy resources)Classification of sedimentary rocksCan be classified as 1) detrital and 2) chemical1.Detrital Rocks formed mostly ... Read More

A Study of the Planet Earth (1375 words, 2 pages)

Earth is the only planet in our solar system that sustains life, and therefore one of the most intriguing planets because of its capabilities. Each of the seven other planets that orbit the same sun as Earth is interesting in its own way. Some planets share similar characteristics to those ... Read More

A Research on 3 Types of Ultraviolet Radiation: UVA, UVB and UVC (1846 words, 3 pages)

No one knows the suns energy output although it is estimated to be 386 billion, billion megawatts. Some of this energy makes it to the Earth in the form of ultraviolet radiation. There are 3 types of ultraviolet radiation UVA, UVB and UVC. These UV rays can damage skin cells ... Read More

An Analysis of the Chromosome Study of Trisomy 21 (1257 words, 2 pages)

Genetic Forms of DSAll individuals with DS have extra chromosome 21 material. There are 3 genetic mechanisms for trisomy 21. The first and most common, is called non-disjunction, where there is an entire extra chromosome 21 in all cells. A chromosome study (karyotype) of trisomy 21 is shown in Fig. ... Read More

A Study of Doppler Radar (706 words, 1 pages)

Doppler RadarThe Social realm of Doppler radar relates to many different things we do in everyday life, anytime you are going outdoors anywhere in the world you can find out what it is going to be like before you even step outside. This is made possible with the use of ... Read More

A Study of DNA or Deoxyribonucleic Acid (847 words, 1 pages)

DNA, which stands for Deoxyribonucleic acid is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms. The main role of DNA molecules is the long-term storage of information. These nucleic acids consist of long chains if chemical units called nucleotides. ... Read More

A Report on the Bombardment of Uranium with Neutrons (1076 words, 2 pages)

On bombarding uranium with neutrons, Fermi and collaborators1 found that at least four radioactive substances were produced, to two of which atomic numbers larger than 92 were ascribed. Further investigations2 demonstrated the existence of at least nine radioactive periods, six of which were assigned to elements beyond uranium, and nuclear ... Read More

A Study of Dinosaur Eggs and Nesting (1955 words, 3 pages)

Dinosaur Eggs and NestingThe typical image of a dinosaur birth to most people is a single gigantic sized egg, maybe green or yellow in color with some dark shading, cracking open to reveal a pint-sized dinosaur ready for the hunt. This image has been reinforced by media portrayals in television ... Read More

A Comparison of Ionic and Covalent Compounds (877 words, 2 pages)

Differences Between Ionic and Covalent CompoundsAbstractIn chemistry, a compound is a substance formed from two or more elements, with a fixed ratio determining the composition. A defining characteristic of a compound is that it has a chemical formula. Formulas describe the ratio of numbers of atoms in a substance. Compounds ... Read More

A Study of the Diels-Alder Cycloaddition Reaction (861 words, 1 pages)

THEORYThe Diels-Alder cycloaddition reaction was discovered by Otto Diels and Kurt Alder and is very useful in the synthesis of polycyclic compounds. The Diels-Alder reaction can be described as 42 cycloaddition- a diene with 4 electrons 2 electrons from the dienophile a pericyclic concerted reaction- meaning the reaction occurs in ... Read More

An Essay on the Determination of Chloride (949 words, 2 pages)

ISE The Determination of ChlorideUnknown 34I.Purpose In experiment V, ISE The Determination of Chloride, the concentration of an Unknown Chloride solution, and the Wt of NaCl in a sample of celery salt, were both determined. To determine the concentration of an Unknown Chloride solution, a Calibration plot is first prepared. ... Read More

The Disappearance of the Purple Color That Indicated the Consumption of the Crystal Violet Dye (329 words, 1 pages)

Purpose To determine the reaction order with respect to crystal violet dye.Procedure Turn on a Spectronic 20 and warm it up for at least 15 minutes. Be sure the wavelength is set to 540nm. When the instrument has warmed up, use a clean small test tube from the drawer filled ... Read More

An Analysis of the Ethical Concept behind Choosing the Sex of a Child (974 words, 1 pages)

Is it ethical to be able to choose the sex of a child, his or her specific traits, or genetic characteristics? This is an important topic that is up for debate, and although there does not seem to be any right or wrong answer, this is very controversial. Many people ... Read More

An Analysis of the Importance of Water and the Concept of Dehydration (1332 words, 2 pages)

Dehydration The Importance of WaterDehydration is defined as a loss or insufficient levels of water and important blood salts like potassium and sodium in your body. Important organs like the kidneys, brain, and heart can not function properly without water and salt. Dehydration is most common in underdeveloped countries, were ... Read More

The Importance and the Healing Properties of Water for the Living Organisms (1214 words, 2 pages)

Water, or H2O as some of us know it, is the liquid that gives us rain, and forms the seas, lakes, rivers and is the basis of the fluids of living organisms (Merriam-Webster Dictionary). Water is an essential macronutrient, and is one of the most important liquids required by humans ... Read More

An Understanding of Dark Matter (1955 words, 3 pages)

DARK MATTER - WHAT IS IT?Scientists using different methods to determine the mass of galaxies have found a discrepancy that suggests ninety percent of the universe is matter in a form that cannot be seen. (1). This strange material that dominates the Universe but which is invisible to current telescope ... Read More

An Analysis of the Expansion of the Ideas on the Atom Theory in Science (271 words, 1 pages)

Quite a few scientists have helped to create and extend ideas on what an atom is and what its components are. One of these discoverers, John Dalton, developed the first modern atomic theory. Although much of his theory is still true today, one point was disproved by Ernest Rutherford. Daltons ... Read More

The Methods of Using Reproductive Hormones to Alter Human Fertility (919 words, 1 pages)

Controlling Reproduction Using reproductive hormones to alter human fertility.Fertility is the capability to produce offspring therefore infertility is the incapability to produce offspring. Infertility can arise in both males and females and can be acquired through inheritance or psychological problems. In men infertility can come by failing to gain or ... Read More

An Analysis of the Factors that Affect the Rate of Reaction of Catalyse, an Enzyme (584 words, 1 pages)

IntroductionThis experiment will investigate the factors that affect the rate of reaction of the enzyme catalyse, an enzyme found in food such as potato and liver. Catalyse is used to remove hydrogen peroxide from cells. The enzyme speeds up the rate of decomposition of hydrogen peroxide into water and oxygen. ... Read More

The Ethical Questions of Organ Cloning for Transplantation in Medicine (1381 words, 2 pages)

Andre SzyszkowskiPsy 130042805Cloning Choice is EthicalThousands of people a year are placed on the organ donor's list. Thousands of people a year are diagnosed with diseases that are dubbed fatal unless a transplant or transfusion is given. This has created a large demand for some alternative method to the present ... Read More

The Common Reasons People Support Cloning (356 words, 1 pages)

Common Reasons People Support CloningSupport of scientific research Recovery of lost loved onesInfertility cloning a fertile copy of themselvesEugenics making a superhuman raceCreation of spare body partsReproduction of their own qualities Eugenics There are many people who believe the human race would be better off if specific traits could be ... Read More

An Analysis of the Concept of Technological Advancement Over the Course of Centuries in Human History and the Possibility for Cloning (1461 words, 2 pages)

During the past few centuries, technology has reached a new level. With breakthroughs from the invention of electricity to the development of the Internet, these advances have made a huge impact on society. Every day brings the question of what will come next, and what technologies will further enhance the ... Read More

An Analysis of the Classification Tests Used for Identifying the Different Classes of Organic Compounds (3516 words, 5 pages)

I. AbstractThe experiment Classification tests on Organic Compounds, allows the students to be familiarized with different classification tests used for identifying the different classes of organic compounds examine unknown compounds using appropriate tests and identify functional group of an organic compound based on the tests performed. Several organic compounds with ... Read More

Biology Essay Examples