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» Browse Science and Environment Term Papers
What Is Macroevolution?
Number of Words: 1087 / Number of Pages: 4
... the new ecological niches in which they find themselves, they tend to stay pretty much as they are for the rest of their existence. Phyletic gradualism suggests that species continue to adapt to new challenges over the course of their history. Species selection and species sorting theories claim that there are macroevolutionary processes going on that make it more or less likely that certain species will exist for very long before becoming extinct, in a kind of parallel to what happens to genes in microevolution.
The history of the concept of macroevolution
In the "modern synthesis" of neo-Darwini ...
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Lasers 3
Number of Words: 809 / Number of Pages: 3
... the invention of the maser many scientists became interested in the idea of building an optical maser, which soon received the name laser (light amplification by stimulated emission of radiation). Townes paired with Arthur Schawlow, two Soviets, Nikolai Basov and Aleksander Prokhorov, as well as Gordon Gould were all interested in developing a light-amplifying device. All of them knew that there were three essential ingredients in making a laser; a florescent material that would emit light when stimulated by radiation from an external energy source, two facing mirrors on the sides of the florescen ...
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Coral Fish
Number of Words: 1128 / Number of Pages: 5
... terminal male is the one with the brightest colors and gaudiest patterns.
The moon seems to play an important role in fish reproduction. According to Peter H. Pressley, it appears that the moon/s light may be as important as its gravitational pull. "Some fishes may use periods of maximum moonlight for effective nest guarding during the week or so it takes for many demersal eggs to incubate. Since the larvae of many dermersal-spawning species are light sensitive, bright moonlight may help to orient them towards the water's shallows after nighttime hatching." (P 96)
Regional weather patterns such a ...
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Le Virus Ebola (spanish Essay)
Number of Words: 696 / Number of Pages: 3
... medcins, ne savons pas. Il croien que le virus est devenu d'une centre serveru animal, comme un chauff souris, un souris est probablement un singe. L'origine exacte, les emplacements et l'habitat normal du virus d'Ebole rest inconnus.
Comment Est ce-que le virus nous tuer?
Cette question est la plus populair est aussi le plus interesant. Tous les victims d'Ebola, mort a cause de hemorragique. Quand quelq'un contract le virus Ebola, ils restant vivent pour huit a seize jours. Pendant c'est jour, beaucoup chose ce passe entre la corps de la victims. Le victim commence avec un fievre, des fr ...
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Acid Rain
Number of Words: 952 / Number of Pages: 4
... as low as 2.5 on the pH scale (forty times more acidic than water.)
Acid deposition kill fish, soil bacteria, and as well as aquatic and terrestrial
plants. the acid also drain the soil of essential nutrients such as aluminum and
releases them into bodies of water such as streams, lakes, and ponds. These
bodies of water develop highly concentrated levels of these nutrients which can
really harm the aquatic life forms in that area Those areas without any alkaline
metal deposits in the soil to neutralize some of the acid are hurt the most by
this destructive force, destroying crops, trees and even ...
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Computer Illiteracy
Number of Words: 686 / Number of Pages: 3
... even more problems with being computer illiterate. For an essay, the teacher requires that they go to the library to do research. The computer illiterate happily walks into the library to do their research. Imagine their surprise when they find out that the main tool of research is one of those darn computers. The poor illiterates stare blankly at a computer screen while the monotone library aide goes through a boring speech about how to use the computer. Because they are computer illiterate, the research takes twice as long than that of those who know the basics of computers. The other day ...
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Ebola Virus
Number of Words: 743 / Number of Pages: 3
... poor drinking water can cause contraction of the virus. Luckily enough Ebola is not airborne and in some cases due to its self-limiting nature, it has been known to die out within a person before killing the host. In one case when a Swiss researcher found the Ebola Tai virus, she contracted it from a chimpanzee. This was during an investigation into the spur of deaths among them at the time. To this day, there is still no evidence as to what host carried the virus before humans and no location of the virus is known.
The Effect on the Body
Within the 4 to 16 days the Ebola virus starts to sh ...
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Natural Disasters
Number of Words: 2589 / Number of Pages: 10
... early season starts June first and runs to
September 10. The late season starts on September 10 and runs to the end of
November. The date of September 10 is the midway point between the two seasons.
This is the date that separates early season from late season. This leads me to
what my research was about. I am writing about the differences between early
season and late season hurricanes and how they effect the variable that were
mentioned earlier in the paper. I feel that late season hurricanes cause more
economic loss than early season hurricanes.
I will start by taking about what a hurricane is a ...
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Theory Of Evolution
Number of Words: 1237 / Number of Pages: 5
... the proteins started reproducing themselves, and simple life was "born".
During uncounted eons, this simple life gradually became more and more complex as chance modifications of the original proteins combined with external conditions of moisture, temperature, food supply, etc., to eventually produce all the varied and complex life forms inhabiting first the oceans, then the land, and finally the air, that we see today. Homo sapiens is seen as the topmost branch in the evolutionary tree of life, but the tree is still growing, and who knows what the next branches will look like? “
I wasn’t ...
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Ozone Depletion In The Antarctic
Number of Words: 1703 / Number of Pages: 7
... destroys ozone. This is a cyclic process and therefor means that one chlorine can destroy many ozone molecules (Figure 1.2)
During the winter in the Antarctic the circumpolar vortex, which is a strong westerly circulation around the continent, builds in the stratosphere. This phenomenon causes the interior of the stratosphere to be cut off and the temperatures drop below -800C. This results in thin clouds forming and that enables reactions with gases containing chlorine to take place. In the spring the sun returns and the chlorine in the stratosphere begins a series of ozone destroying catalytic ...
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