.... it can do within weeks what it would take several years through genetic breeding programs. Pigs on PST will consume less food and reach market age faster. Good management enhances the effect of PST. Research has made an indication that pigs that have been treated with PST are leaner. Their meet is very similar in color, taste, tenderness, and juiciness to those who have not received PST. As pigs grow closer to market weight, they produce less PST, which results in poor feed efficiency. The muscle gain stays fairly constant while more nutrients taken in by the animal are used in fat production causing the animal to require more energy for the product .....

.... sex. You can also acquire the disease through sharing needles, toothbrushes, and razors, or if you come in contact with infected blood. For these reasons, the people at the highest risk of contracting the disease are: anyone who is sexually active; health, dental, and emergency workers; adoptive families with children form Asia, Africa, South America, Eastern and Mediterranean Europe (as these areas have a high number of people infected); drug users; and anyone in close contact with someone infected. This is not as scary as it seems, for you cannot contract the virus through sneezing, coughing, or holding hands. A surprising fact about hepatiti .....

.... their own science: Creation Science. Creation scientists look to prove that creation is right and science is wrong, providing selective interpretations of the fossil record. But their interpretations are exaggerated and foolish. Creationists will pick one scientific theory and do everything they can to point out it's flaws, disregarding what they can't prove wrong. They will often use emotions to control the public to their side. They spend their time trying to discover false evolution rather than teaching their beliefs to the general public. The theory of evolution removes humans from the center of the universe, and religious followers can't believe that thei .....

.... ozone layer protects the Earth and its inhabitants by screening out this harmful light. For " millions of years ozone has been protecting the earth " by absorbing ultraviolet or bad radiation from the sun ( Rowland, 1992, p.66 ). This natural umbrella protecting mankind has recently suffered the effects of industrialized society. This " ozone shield is dissipating " and the cause is laid primarily to man - made chemicals ( Bowermaster et al, 1990, p.27 ). If enough of these man - made chemicals are released, "the ozone layer would be weakened to such an extent that it does not filter out the sun's invisible and dangerous ultraviolet rays " ( Jones, 1992, p.36 .....

.... no idea why. Maybe you would like to answer that? Aquatic animals use gills, which are outgrowths from the body which increase surface area over which gas exchange can occur. Inside the gills of aquatic animals, the circulatory system removes oxygen, and delivers waste carbon dioxide. Land vertebrates have developed a different approach to the problem of gas exchange, as water is not present in all of the terrestrial environment. Terrestrial vertebrates have developed lungs to solve this problem. Air enters through the nasal passages, or the mouth, passes through the trachea, then branches off at the two bronchi, and goes through many branching passages ca .....

.... changes can, in turn, lead to a variety of health problems including cancer, decreased fertility, and abnormalities in newborns. Evidence provided to support these claims of human and wildlife harm is largely from laboratory studies in which large doses are fed to test animals, usually rats or mice, and field studies of wildlife species that have been exposed to the chemicals mentioned above. In laboratory studies, high doses are required to give weak hormone activity. These doses are not likely to be encountered in the environment. However the process of bioaccumulation can result in top-level predators such as humans to have contaminants at levels man .....

.... erroneous, but even the most recent pieces of evidence do not unambiguously demonstrate the existence of life on Mars." ( Sagan and Shklovskii 273) Some scientist believe man should look up in the sky searching for new habitats for future generations, since human kind today seems to be going backwards in many aspects of the earth's ecology. The first attempt would be to study the moon; the second, our neighbor planet. Unfortunately, our actual technology slightly provides strong, useful information about the red planet because of the vast distance between us. While people such as Steven Spielberg and George Lucas try to convince us with hundred million .....

.... contest, Christa McAuliffe. The disaster: the explosion of the Space Shuttle Challenger. (Compton's 1) Many people thought that disaster couldn't strike because a civilian was on board. But as the whole nation found out, nobody is immortal. By examining this further, we will look at the lives of the seven who died in this dumbfounding calamity, take a look at exactly what went wrong during this fateful mission, and the outcome from this sorrowful occurrence. First, who exactly were those astronauts that died on the Challenger? Sharon Christa Corrigan McAuliffe, born in 1948, was the famous winner of the teacher-in-space program, was a high school teacher .....