The Polar Bear
.... this feature. These pads help the bear retain heat and to grip the ice and provide better traction. Polar bears are fast movers. When on uneven ice the bear will “trot”, moving its legs on opposite sides in unison. It can trot at 12 to 18 miles per hour. When it is running, it can reach speeds of up to 35 miles per hour. The bear can travel around 50 miles on an average day.
The polar bear is also an expert swimmer. The bear has a long neck with a small head which help it to be more streamlined when it is in the water. It also has partially webbed feet which help it to paddle through the frozen waters. When swimming .....
|
|
Cloning, Right Or Wrong
.... be recreated and studied to find out what their motivations were.
Besides from all these good points cloning also has bad points. The biggest problem with cloning on a large scale is the lack of genetic diversity. If everyone has the same genetic material, what happens if we lose the ability to clone? We would have to resort to natural reproduction, causing us to inbreed, which will cause many problems. Religious people are completely against cloning. They generally say that scientists are not respecting the fact that humans have souls and we would be taking the work of God into our own hands.
Dolly the sheep was the .....
|
|
Vivisection
.... is another opinion to this debate. I can almost understand why they would believe in vivisection. The only time I believe it should be used is for patients dying of cancer. I still do not think it is right. We might not have some of the cures we have today without animal testing, although maybe we would. Maybe we would have more. Nobody knows. I still firmly think it is wrong to do evil experiments on animals.
A big problem today is whether or not scientists should use animals for experimental purposes. If we have other alternatives we should use them. Animal testing is cruel. If scientists are so smart they should be able .....
|
|
Greenhouse Effect
.... serious threats. The problem lies in the disruption of the balance between how much carbon dioxide plants intake, and what our population produces. If this natural filtering process is unbalanced, the atmosphere will receive too much carbon dioxide and other greenhouse gases. Once these gases form in the atmosphere, they act as barriers trapping in heat and warming the earth. This process is not new. In fact, without the greenhouse effect, the average surface temperature of the earth would be about 59 Fahrenheit degrees lower than it is today. "Long before civilization intervened , the thin blanket of gases that surround the earth .....
|
|
The Formation Of Rocky Shores
.... At the highest point on the rocks is the black zone, marked by blue-green algae. This transition area between land and the marine environment is flooded only during the high spring tides. The algae, enclosed in gelatinous sheaths to resist drying, are grazed on by periwinkles, which are protected under tightly sealed, conical shells. Below the black zone lies the white zone, where barnacles are tightly glued to rocks. Living among the barnacles are rock-clinging mollusks called limpets. At low tide, barnacles keep their four movable plates closed to avoid drying. At high tide they open the plates and extend six pairs of wand .....
|
|
The Destruction Of Red Tides
.... tides develop by pouring fresh water and nutrients into surrounding sea waters," (New York Times: Sept. 19, 1996) Fast growing algae quickly strip away nutrients in the upper layer, leaving nitrogen and phosphorus only below the interface of the layers, called the pycnocline. Many swim at speeds of 10 meters a day, and some go through vertical migration rising to the top of the water to get sun and then swimming down to the pycnocline to take up nutrients at night. Another cause of red tides is from human pollution. "nutrient runoff from human development, the heavy use of fertilizer and livestock farms is feeding the growth of .....
|
|
Botany And Botanists
.... can name is that plants have intrigued people for thousands of years. Plants are used for decoration, as well as our basic needs, such as: food, shelter, and even the air we breathe. Today, our world requires new needs for plants. Increasing human population is linked to gigantic environmental problems. Among them is the need for more food to feed the world. Pollution of both air and water is becoming increasingly harmful to surrounding plant areas. New and improved technology is helping us solve these problems, but they will still need young minds to use that technology for the better good of humanity. One of the many .....
|
|
Religion & Evolution
.... a puppet-master and "pulling the strings" of the Earth and all of the people therein.
Since this paper touches upon many scientific terms, I feel that in order for the reader to correctly grasp the content I must first define three words: Theory, Law, and Hypothesis. The definitions will allow for a greater understanding of this essay and give us an even ground upon which to begin.
Theory; noun
1. a. Systematically organized knowledge applicable in a relatively wide variety of circumstances, especially a system of assumptions, accepted principles, and rules of procedure devised to analyze, predict, or otherwise explain .....
|
|
Solar Cells
.... there is an "energy gap", in which no electron orbits can exist, between the inner valence band and outer conduction band [Book 1]. Valence electrons help to bind together the atoms in a solid by orbiting 2 adjacent nucleii, while conduction electrons, being less closely bound to the nucleii, are free to move in response to an applied voltage or electric field. The fewer conduction electrons there are, the higher the electrical resistivity of the material. In semiconductors, the materials from which solar sells are made, the energy gap Eg is fairly small. Because of this, electrons in the valence band can easily be made to .....
|
|
Cloud Formations
.... sky. The cirrostratus clouds sometimes form tangled webs or thin whitish sheets. A large ring or halo is sometimes seen around the sun or moon when the cirrostratus covers the sky.
The middle layer of clouds range in altitude from 6,500 to 23,000 feet. The altocumulus, altostratus, and nimbostratus clouds are found in the middle division. The altocumulus clouds are more rounded and puffier than the cirrocumulus clouds. When people stare at the altocumulus clouds, they usually see a shape of an animal, usually an elephant. Altostratus clouds cover the sky with a grayish veil through which the sun or moon may shine a .....
|
|
Darwin’s Finches
.... on different sides of the Tana River in Kenya. They are phenotypically distinct, and can only produce fertile offspring in zoos.
Sympatric speciation occurs when two segments of the same species occupy a geographical area without interbreeding. Each new species, or subspecies, adapt to a specific environmental niche (adaptive radiation).
Two segments of the same species Adapted to different niches
An example of sympatric speciation is the genus Rhagoletis. These are a group of small flies whose larvae feed on developing fruit. The Rhagoletis pomonella is a species that feeds on hawthorns. These flies then found .....
|
|
Possibility Of Terraforming One Of Earth's Neighboring Planets
.... Terraforming: Engineering Planetary Environments. I have chosen Fogg's book as my second primary source because it is the only book of its kind that addresses the question of terraforming in a non- science fiction context.
The successful terraformation of a planet requires the synthetic development of a biosphere. The problems that present themselves are indigenous to the Geophysical and chemical properties of each test subject (planet). Overcoming these obstacles requires an in depth knowledge of each planet's atmosphere and soil composition. The Earth must be used as a point of reference. For instance, one must know how ocea .....
|
|
|
