.... a blood-clotting disorder) and others who had received blood transfusions; females whose male sexual partners had AIDS; and the children of parents with AIDS. However since 1989, heterosexual sex was found to be the fastest growing means of transmission of the virus, with 90 percent of the new cases coming from heterosexual sex. How AIDS Is Spread AIDS is transmitted by direct contact of the bloodstream with body fluids that contains the AIDS virus, particularly blood and semen from an HIV-infected person. The virus is usually transmitted through various for .....

.... are diagnosed with ALS each year. There is great variation in the course of the disease. Symptoms usually appear in individuals between the ages of 40-70, though the disease has been reported in both younger and older persons. Survival after the confirming diagnosis is, on average, two to five years. Progression of ALS varies with each individual; therefore, some will live longer--up to 10 years, and about five percent will exceed 12 years. In some cases, the disease seems to plateau. Many patients are able to live productive and satisfying lives especially with the use of .....

.... Animal life is abundant. There are fewer large animals but an absorbent amount of smaller animals. Animals such as raccoons, skunks, foxes, voles, and mice are very common in the deciduous forests. Amphibians are just as common such as frogs, toads, and salamanders. Threats to this biome are happening more frequently. Acid rain and air pollution is threatening plants and animals. Deer population has become a bigger threat over the last decade. Because the deer have not enough predators to the area, their size is over growing. Tree bark is being striped from .....

.... of the comet, is a “dirty snowball” conglomerate of ices and dust. Major proofs of the snowball theory rest on various data. For one, of the observed gases and meteoric particles that are ejected to provide the coma and tails of comets, most of the gases are fragmentary molecules, or radicals, of the most common elements in space: hydrogen, carbon, nitrogen, and oxygen. The radicals, for example, of CH, NH, and OH may be broken away from the stable molecules CH4 (methane), NH3 (ammonia), and H2O (water), which may exist as ices or more complex, very cold compounds in the nucle .....

.... that contained most of the atom's mass (the nucleus). He also explained that the particles that went straight through the foil did so because the atom is mostly empty space and that the distance between electrons and the nucleus is vast compared to the size of the nucleus itself. In 1919, he discovered the "artificial disintegration" of nitrogen. His experiments show that under alpha radiation, nitrogen is decomposed and hydrogen is formed. Rutherford also devised an electrical method for counting the number of alpha particles emitted from radioactive substances. Using thi .....

.... together and cannot be broken down by water. This means they travel into the atmosphere virtually unharmed by rain or decomposition (Goldfarb 282). The reason these are causing such a commotion is the damage they cause to living things on Earth. When the ozone depletes, it causes more ultraviolet (UV) rays to hit the Earth's surface than are healthy (Singer and Crandall npg). UV rays affect the DNA of every living cell, altering the protein make-up of that cell (Goldfarb 288). Most importantly it affects "microscopic photoplankton" which rest at the bottom of the food ch .....

.... plants have evolved to withstand long, dry summers and strong autumn Santa Ana winds that create frequent fires. The leaves of the plants are mostly thickor needle like so it can reduce water loss through evaporation. The chamise, for example, has small, needle-like leaves that store up and save the moisture in the plant. The is the home of many species of reptiles, birds, and mammals. There are animals such as the alligator lizard, western rattlesnake, quail, roadrunner, scrub jay, brush rabbit, coyote, and mule deer. Some species are restricted to habitats only, but o .....

.... the excitement of tribal festivals. In more civilized nations, beers and wines in the daily diet were believed beneficial to health. During the 1800’s, a movement began in the United States to prohibit the manufacture and sale of alcoholic beverages. A constitutional amendment banning the beverages went into effect in 1920, but thousands of Americans defied the prohibition law. In 1930, the federal government estimated that about 800 million gallons of alcoholic beverages were being produced in the country annually. The prohibition amendment was repealed in 1933. When .....