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Term Papers on Science
The Use Of Pollen Analysis In
Number of words: 930 - Number of pages: 4.... of survivability combines with another factor inherent in the nature of pollen - the large amount produced - to make pollen analysis one of the most important tools available to the archaeologist. Though one further factor in the make-up of pollen enhances its value, namely the wide morphological variation between pollen from different plant species, most of which can be detected and classified using normal laboratory equipment.
Pollen analysis is a technique which demands a high level of skill on the part of the excavator, scientist and interpreter to enable .....
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Genetic Engineering
Number of words: 1111 - Number of pages: 5.... medical illnesses. The Human Genome Project has allowed
geneticists to map the genes of human beings. This project is far from complete,
as the DNA sequence of humans is extremely long, yet it will eventually show
geneticists which genes are responsible for certain inherited diseases.
Identified genes could be repaired, resulting in the irradiation of inherited
diseases, such as cancer. Just last year, the locations of genes for several
diseases were confirmed and may soon be correctable. Secondly, research in
genetics has brought about a new medical field, gene .....
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Acid Base Extraction
Number of words: 1499 - Number of pages: 6.... Separation of a Neutral and Basic Substance
A mixture of equal parts of a neutral substance containing either
naphthalene or benzoin and a basic substance containing either 4-chloroaniline
or ethyl 4-aminobenzoate were to be separated by extraction from an ether
solution. Once the separation took place, and crystallization was carried out,
it became possible to determine what components were in the unknown mixture, by
means of a melting point determination.
Results
Procedure Observations .....
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Ecology Assignment
Number of words: 1414 - Number of pages: 6.... to count all the individuals in a given space. Explain one method by which biologists can study population densities without obtaining such data.
Scientist barely ever count the amount of individuals in a certain area because it would take too much time. Instead of actually counting the number of individuals in an area they would compare it with other areas where they know the population of individuals. In this way they can roughly estimate the number of individuals in a certain area.
4. What might happen to a rabbit population in an area where there .....
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Collisions Of Two Objects
Number of words: 217 - Number of pages: 1.... of an
isolated system is the table and the balls, and the law then implies that the
total momentum of the balls just before they collide is the total momentum just
after the collision.
Therefore if the masses of two colliding objects are known, the velocity
and the velocity of the other before the collision, you can calculate the final
velocity of this second object after it has collided. To obtain an exact answer
however, we must find out what type of collision takes place, whether it is
elastic or not elastic.
The type of collision is characterized by what is called the coefficient
of re .....
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Heart Murmurr
Number of words: 888 - Number of pages: 4.... artery, which takes blood to the lungs. The arteries are still slightly narrow, and, therefore, blood flow through them will cause a murmur. As the baby grows, the murmur will become softer and many times disappear altogether. Another common innocent murmur heard in children ages 3 to 8 years is a vibratory musical murmur called a Still's murmur. No one knows the cause of the murmur other than blood flowing through a healthy vigorous heart. The murmur is usually detected at a well-child visit or if the child comes in with fever or some other form of illness .....
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The Aging Process
Number of words: 1487 - Number of pages: 6.... disease, strokes, and cancer. Other diseases, accidents, and violence account for the rest--but not age. These same diseases and Alzheimer's disease account for much of the disability attributed to aging. As these diseases are conquered, far more people will live to their full potential life span and remain active and healthy for life.
A lot is known about the diseases that affect people and cause death. Much less is known about real aging because it involves fundamental cell processes that are quite complex. However, this mystery of life is being unravele .....
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Orion Nebula
Number of words: 979 - Number of pages: 4.... emit ultraviolet (UV) light that ionizes the surrounding hydrogen atoms into protons (H+) and electrons (e-). When the protons and electrons recombine, the electrons enter a higher energy level (n=3). Then, when the electron drops from the n=3 level to the n=2 level, an Hphoton is emitted. 2 This photon has a wavelength of 6563 Å, and therefore corresponds to the red portion of the visible spectrum. It is these H photons which give the nebula the distinctive red color which we see.
The extreme brightness of the O-type and B-type stars .....
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