.... animals come from places a little closer to you and me. Some of them come from animal shelters, some from the “free to a good home” ads in the newspaper, or, even worse, some have been stolen directly from their own yard. Imagine your pet being crammed into a cage with ten other animals waiting to die in these cruel and heartless experiments. The current system of drug testing places consumers in a dangerous predicament. For example, some drugs passed safe in animal experiments but proved tragic consequences in humans. Conversely, many drugs that are beneficial to humans are dangerous or even fatal to animal .....

.... four nitrogenous bases. The first two, adenine and guanine, are double-ringed purine compounds. The others, cytosine and thymine, are single-ringed pyrimidine compounds. (Miller, 141) Four types of DNA nucleotides can be formed, depending on which nitrogenous base is involved. The phosphate group of each nucleotide bonds with a carbon from the deoxyribose. This forms what is called a polynucleotide chain. James D. Watson and Francis Crick proved that most DNA consists of two polynucleotide chains that are twisted together into a coil, forming a double helix. Watson and Crick also discovered that in a double helix, the pairing bet .....

.... is sponsored and run by NASA Ames Space Science Division: Asteroid and Comet Impact Hazard. Also under the direction of Dr. Tom Gehrels the University of Arizona has the Spacewatch program. NEOs can be either asteroid or comets. Ninety percent of the information that I came across discussed asteroids. Therefore, I will concentrate on asteroids alone. I'm not fully knowledgeable on the subject but I did learn a great deal. What are NEOs? The "Webster's New World Dictionary" states, "Any of the small planets between Mars and Jupiter". The "Funk and Wagnalls Encyclopedia from Infopedia" states, "One of the many small or mino .....

.... rather than relying on just the phenotypes which may actually prove to be heterozygous and can, therefore, pass on the traits which were intended to be removed. Even the knowledge of a single gene can have a major impact. Just by locating a single pathogen-resistant trait or adding or deleting a single gene can vastly improve the overall quality and value of an organism. One extremely important aspect of DNA technology is what has been done to protect and organism from disease. In some plants, researchers have been able to eliminate disease-causing traits found in the plasmid without harming the plants ability to move vital .....

.... from its terrestrial relatives. These creatures still lived in water, but they had a lot of the terrestrial tetrapod anatomical characteristics. Introduction: Before tetrapods existed, all vertebrates were confined to living in aquatic habitats. The only animals that lived on land were arthropods. Through natural adaptations, the fish developed into amphibians. This colossal stage of change made necessary the evolution of new ways of breathing, locomotion, and reproduction. Paleontologists needed to understand how this transition took place. If the changes in anatomy of the fish developed on land, then they served the same purpo .....

.... of three- temperatures: strand denaturation at 95degC, primer annealing at 55degC, and primer extension at 72deg C, typically 30 seconds, 30 seconds, and 60 seconds for the DNA Thermal Cycler and 4 seconds, 10 seconds, and 60 seconds for the Thermal Cycler 9600, respectively." Basically, that means that they set it to certain temperatures, then put it in different cyles for different amounts of time. PCR machines can be compared with washing machines. There are the different temperatures (here for example, there is 72degC, where in the washing machine you would set it to cold/cold respectively. For it to properly replicate, w .....

.... it should be noted that Heath's work was sharply criticized for avoiding safeguards of bias and reporting "changes" that occur normally in the mammalian brain. Wu et al. found a correlation between cannabis use and low sperm counts in human males. This is misleading because a decrease in sperm count has not been shown to have a negative effect on fertility and because the sperm count returns to normal after cannabis use has stopped.. Another claim made was that cannabis causes chromosome breakage. The primary source for this are studies that were conducted by Dr. Gabriel Nahas in the early 1980s. Nahas observed abnormalities .....

.... Red Tide off of the coast of southwest Florida has some connection with these mysterious deaths. A red tide is a bloom of flagellates which are deadly to marine life, but cause no harm to the human population. Another possible cause is a virus that is unknown to scientists. Many people believe that this problem will eventually stop an the manatee population will flourish, but others are rather pessimistic. Ecological Problem: The manatee population is quickly dying off and unless they make an astonishing comeback, they will soon be extinct. Ecological Solution: A possible solution to this problem is to move the manatee .....

.... led to increasing concentrations of carbon dioxide. The resulting greenhouse effect has reduced the escape of infrared radiation from the earth, causing a possible global warming trend. The Prevention of Air Pollution To cut down on all the pollution being released into the air, we have removed the pollutant before materials are used, removed the pollutant after it is formed, or altered the process to lower pollutant levels produced. In the United States, the Clean Air Act of 1967 is the legal basis for air-pollution control. The Environmental Protection Agency is responsible for enforcing the act. Internationally, 49 .....

.... This characteristic of microwaves, the efficiency with which they are concentrated in a narrow beam, is one reason why they can be used in cooking. You can produce a high-powered microwave beam in a small oven, but you can't do the same with radio waves, which are simply too long. Microwaves and their Use The idea of cooking with radiation may seem like a fairly new one, but in fact it reaches back thousands of years. Ever since mastering fire, man has cooked with infrared radiation, a close kin of the microwave. Infrared rays are what give you that warm glow when you put your hand near a room radiator or a hotpl .....