PAPER Topics

... more rapidly behind so as to leave a sharp, enameled chisel edge. With these can cut down large trees. It usually selects trees 5 to 20 cm (2 to 8 in) in diameter, but it can fell trees with diameters as large as 76 cm (30 in). Beavers have a pair of anal scent glands, called castors, that secrete a musklike substance called castoreum, probably for marking territories. The animals tend to be monogamous and may live 20 years or more. The female has one litter a year, usually of two to four young. Beavers are social animals. In areas where food is abundant and the locality secluded, the number of families in a beaver community is rather large. The so-called beaver lodge is a unique structur ...

... Centore2 Dr. Jain Anatomy & Physiology The many nuclei of skeletal muscle fiber are located underneath the sarcolemma, which is the fiber’s plasma membrane. Thousands of invaginations of the sarcolemma, which are called T Tubules, Tunnel from the surface to the center of the muscle fiber. These T Tubules are open to the outside of the fiber and are filled with extra-cellular fluid. Muscle action potentials propagate along the sarcolemma and through the T tubules and quickly spread through the muscle fiber. This process ensures that all parts of the muscle fiber become excited by an action potential virtually simultaneously. The sarcoplasm is located inside the sarcolemma. ...

... Rain reacts to different types of soil and rocks in two ways. 1) Acid rain will dissolve alkaline rocks and soil, or will neutralize the alkalinity. 2) Acid rain will increase the acidicy of already acidic rocks and soil, such as granite, or the soil which results from corroded granite. Acidic chemicals, and alkaline chemicals react to each other by reducing the alkalinity or acidicy of each other. Which ever has the strongest pH level, usually will neutralize or reduce the pH of the other, but after the reaction is complete, both substances have undoubtably changed, their pH moved closer to neutral ( pH 7 ). This knowledge led to the use of Salting. Salting ( dropp ...

... Some bones were found with spear points in the bodies, some whole skeletons were found closer to the bottom, and some bones were scattered all over. It can be inferred from the patterning of the bison bones that they were butchered differently. Middle range theory also plays a part in the Olsen-Chubbuck site. From the visible remains of the bison, we can estimate from the skeletal remains of the bison that the total meat was 60,000 pounds and the total amount of people capable of butchering the bison would be 150, thereby relating the artifacts to past human behavior. Archaeologists also study patterning in time and space; time, being vertical and space being horizontal. The time of ...

... as CFCs, also known as Chlorofluorocarbons, hydrofluorocarbons, and perfluorocarbons. These gases are generated a number of human activities such as fossil fuel combustion, waste disposal in landfills, the use of a refrigerator, numerous agricultural and industrial activities, and the cutting down of numerous forests. These human practices have already changed the chemical make up of the atmosphere. Between the pre-industrial times and today, we have seen the concentration of carbon dioxide rise 30% in some regions, in particular the northern hemisphere, human practices have increased concentrations of aerosols in atmosphere, which is a traditional form of air pollution), which ...

... diabetes from the Greek word meaning excessive urination, a symptom the Greeks noticed, and mellitus, from the Latin for honey, which is because diabetic urine is filled with sugar and is sweet. Physicians and medical books use the term diabetes mellitus, but is the most commonly called diabetes. There are two major types of diabetes: type 1 and type 2. Both of them are a little different. But everyone with diabetes has one thing in common: Little or no ability to move sugar--or glucose--out of their blood into their cells, where it is the body's primary fuel. Everyone has glucose in their blood, whether or not they have diabetes. This glucose comes from food. When we eat, the digestiv ...

... a teacher, someone who is interviewing you for a job, or simply someone you are trying to get romanticly involved with. Then there are the more harmful and insidious side effects of smoking. Such as lung cancer, cancer of the throat, and other health problems too numerous to mention. Lung cancer has become very common amoung smokers and it is known fully by most smokers that they are getting cancer sooner or later as long as they continue to smoke as if it is an ineviatble fate. This is not only so to the smoker but the second hand smoke that others breathe in around a smoker is just as detrimental to you health. Another common illness that may not be caused by smoking but that definit ...

... Panel on Climate Change. Their consensus is a concern for the environment in the next century if fossil fuels continue to be used, even at present global levels. The Panel claims that for carbon dioxide to be stabilised to safe levels, a 50-80% reduction in all emissions would be required. The United Nations has predicted a world population growth from 5.5 billion to 8.5 billion by the year 2025, meaning demand for energy will increase. Nuclear power is the only practical source, in consideration for the environment, cost and efficiency. Coal-fired generation of electricity would increase carbon dioxide emissions, and renewable sources such as solar and hydro, are not ...

... into the ocean. Industrial, agricultural, household cleaning, gardening, and automotive products are also polluting our ocean. You wouldn't believe it but all of those products I just named regularly end up in water. About 65,000 chemicals are used commercially in the U.S. Today, with about 1,000 new ones added each year. Only about 300 have been extensively tested for toxicity. I think that since our oceans are doing so bad the U.S. should put a ban on new, and old, products that pollute the oceans. Metals and slowly degrading chemicals threaten inland and coastal waters. Toxic materials settle into sea floor where they accumulate as hazards to organisms that live in and feed on b ...

... the freedom of sexual preference throughout our society. As Thomas Jefferson stated in "The Declaration of Independence," "We hold these truths to be self- evident: that all men are created equal; that they are endowed by their Creator with certain inalienable rights; that among these are life, liberty, and the pursuit of happiness"(314). If we are told that we have the right to life, liberty, and the pursuit of happiness, then we should have the right to live with the homosexuality gene and have the right to sexual preference. No one should have to give up that freedom. A freedom that homosexuals would most likely consider a source of happiness. Homosexuals are happy with their sexu ...