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» Browse Science and Environment Term Papers
Darwin's Theory And Modern Genetics
Number of Words: 324 / Number of Pages: 2
... This discovery led to modern genetics. We now know chromosomes carry valuable information that determines characteristics in living species.
When you put these two discoveries together you really understand how animals have evolved to their currant state. When animals are born the have traits that help them live or inhibit their ability to live. If the die they cannot mate with other animals therefore they don’t pass on the traits that killed them. The animals that live pass on the chromosomes that helped them survive. In human populations this is also evident. In some areas of the world ...
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Genetic Engineering 2
Number of Words: 1140 / Number of Pages: 5
... the perfect human does in-fact sound crazy. But if genetic engineering was regulated to prevent such things the new science could bring wonders to many peoples lives.
The first form of genetic engineering began with a man named Mendel, a monk in the late nineteenth century. He was the first to even formulate the concept of the gene from his experiments on pea plants. Since Mendel, other scientists have continued in agricultural engineering, a type of engineering that deals with the cross breeding of plants and cattle to maximize their productivity. Through time geneticists have continued to find ...
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Biology
Number of Words: 1205 / Number of Pages: 5
... of the prothallus. The archegonia are at the notch of the prothallus and
the antheridia are located near the tip. Fertilization occurs when outside
moisture is present and the sperm from the antheridia swim to the eggs of the
archegonia. A zygote is formed on the prothallus and a new sporophyte grows.
4. Flowering plants have unique characteristics that help them survive.
One is the flower itself that contains the reproductive structures. The color
of the flower helps because it may attract birds and insects that spread the
plants pollen which diversify the later generation of plants. ...
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Ebola Virus 4
Number of Words: 2184 / Number of Pages: 8
... a glycoprotein, a polymerase and 4 other undesignated proteins. Proteins are produced from polyadenylated monocistronic mRNA species transcribed from virus RNA. The replication in and destruction of the host cell is rapid and produces a large number of viruses budding from the cell membrane.
Epidemics have resulted from person to person transmission, nosocomial spread or laboratory infections. The mode of primary infection and the natural ecology of these viruses are unknown. Association with bats has been implicated directly in at least 2 episodes when individuals entered the same bat-fill ...
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Wavelength Of 10 Or Higher And 11 Down. Gamma Rays Are Produced In Labs
Number of Words: 646 / Number of Pages: 3
... used in nuclear
reactors and atomic bombs.
Gamma rays are often used in the food industry. The radioisotopes
preserve foods. Although the rays never come in contact with the food, Beta
radiation kills various organisms such as bacteria, yeast, and insects. Gamma
rays are sometimes used in science. They are used to detect Beryllium. They also
played a very important role in the development of the atomic bomb.
Gamma Rays can be very dangerous to use or be in contact with. Gamma
rays bombard our bodies constantly. They come from the naturally radioactive
materials in rocks and soil. We take some of thes ...
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Monarch Butterflies Coevolution With Milkweed
Number of Words: 572 / Number of Pages: 3
... the time the caterpillar is ready to become a chrysalis it has grown to be about 45 millimeters in length. The chrysalis is pale green and spotted with gold. It becomes more transparent as the butterfly gets ready to break free. The adult Monarch has a wingspan of about 4 inches. The male and female can be told apart by a gland on the wings. It is apparent as a black circle on the male, which is not present in the female. The Monarch is native to North and Central America. The plant and its pollinator have grown to depend on each other.
The Monarch has an extensive migration pattern. Every autumn thou ...
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Mercury Report
Number of Words: 1920 / Number of Pages: 7
... contracted which in turn broke the crust and produced the prominent lobate scarps. During the third stage, lava flooded the lowlands and produced the smooth plains. During the fourth stage micrometeorite bombardment created a dusty surface also known as regolith. A few larger meteorites impacted the surface and left bright rayed craters. Other than the occasional collisions of meteorites, Mercury's surface is no longer active and remains the same as it has for millions of years.
Plains cover the majority of Mercury’s surface. Much of it is old and heavily catered, but some of the plains are less hea ...
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Linux Against Microsoft Windows
Number of Words: 1890 / Number of Pages: 7
... designers,press companies and advertising companies, can be run with Linux. The others are Sun Sparc&Sun Ultra, Amiga, 3Com Palm Pilot which are rarely used. This capability of Linux provides a large user number and user kind that makes Linux more popular.(www.linux.org)
Linux has a powerful security system.It is almost impossible to write a virus for Linux because it must be 30-40 Mbytes.Also it has firewall system to protect the network from the hackers.If we think that there are a lot viruses for windows that can harm all of your system, we can understand how Linux is secure.Linux is a sta ...
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Cells
Number of Words: 333 / Number of Pages: 2
... area must be large enough to allow the cell’s organelles to receive the material it needs or it will die. The eukaryotic cell does this by maximizing the surface area to volume ratio. By using the surface area and volume equations for a sphere you can estimate the surface area of a small cell. By modeling the growth rate of the surface area and volume of a sphere on a linear graph its easily discernible that as the size of the sphere increases the ratio of surface area to volume dramatically decreases until finally the volume of the sphere surpasses the surf ace area. Simply, by minimizing its s ...
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Helium
Number of Words: 521 / Number of Pages: 2
... absolute zero, it is transformed into helium II,
also called super fluid helium, a liquid with unique physical properties.
It has no freezing point, and its viscosity is zero; it passes readily
through minute cracks and pores and will even creep up the sides and over
the lip of a container. Helium-3, the lighter helium isotope of mass 3,
which has an even lower boiling point than ordinary helium, exhibits
markedly different properties when liquefied.
Because it is noncombustible, helium is preferred to hydrogen as
the lifting gas in lighter-than-air balloons; it has 92 percent of the
lifting ...
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