... are adenine, cytosine, guanine, and thymine. Conventionally the bases are abbreviated as A, C, G, and T (respectively) for simplicity reasons. At the smallest level, DNA is organized into a double helix. The DNA helix is then repeatedly coiled to allow more of it to fit into a compact space. This helix replicates and passes on its information to the body's cells. In humans, all the DNA is packaged into 46 separate molecules called "chromosomes." The chromosomes each contain thousands of genes, with each gene specifying how to make a particular protein necessary for cellular function. Scientists have long thought that the key to understanding human life lies in ...
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... equator. It is important to understand the geology of Africa, because many of the diseases, which were born, had a lot to do with the climate and land region they were growing in. Africa has struggled with many different types of disease within their society due to their type of land, climate and weather. "Among all the diverse natural environments of the earth, tropical rain forests are the most variegated in the sense that more diverse forms of life share this kind of habitat than occupy drier, cooler regions."(McNeill,16) Africa possesses the prefect breeding ground for many diseases. There were many diseases and viruses that have had an impact on Africa, ...
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... may be the only symptom. This may be partially due to the fact that you stay in your room sleeping for eight hours at a time. Dust mites collect in your bedding, curtains, pillows and rugs. To avoid this, you should have your mattress and pillows sealed in a plastic covering, no curtains and you should have hard wood floors in your bedroom, instead of rugs or carpets. " Office Visits: From 1975 to 1993-1995, the estimated annual number of office visits for asthma more than doubled, from 4.6 million to 10.4 million. Increasing rates were evident among all race, both sexes, and all age groups. Emergency Room Visits: Data for emergency room visits are from 199 ...
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... of the elements are periodic functions of the atomic weights. provides an easy way to show the division of the elements into acid-forming and base-forming types. Those on the left are base-forming; those on the right are acid-forming. Those in between can be either. They have so-called amphoteric oxides and hydroxides that can act like acids or bases. 's arrangement also divides the elements into metallic and nonmetallic kinds. A distinction is usually made between most pure metals and nonmetals according to physical and chemical properties. Another virtue of is that it is universal. No matter where it is used any scientist can understand it.It is an universal ...
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... and no proof that small amounts of liquor are safe. As little as one drink a day can cause a baby some degree of harm and interfere with their normal development. The more the mother drinks the greater the risk of damage to the baby. "The Syndrome occurs in anywhere from point five to three live births per thousand in western countries…It is estimated that between thirty and forty percent of all woman who drink heavily during pregnancy will have a child afflicted with Fetal Alcohol Syndrome…Fetal Alcohol Syndrome outranks Down's Syndrome in prevalence and is the leading case of mental retardation" (Britanica 1). Once the damage is done it cannot be un ...
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... endangered when of its kind occurs in a low number. About 1000 species in the world are named endangered, or are in threat to be extinct. I never knew that some kinds of birds were in danger. We can help these animals and plants by making laws that you are not allowed to hunt or kill any animal that is in danger of extinction. Government Involvement Only since the 19th century has there been worldwide concern about the case of species in their natural environments. Finally in 1916 they made a law called Migratory Bird Treaty. They had this law in United States, Great Britain, Canada, and later in Mexico. This law was made so that people can not kill animals ...
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... Consequently, a single ounce of gold can be drawn into a wire five miles long. Gold's malleability is also unparalleled. It can be shaped or extended into extraordinarily thin sheets. For example, one ounce of gold can be hammered into a 100 square foot sheet. Gold is the most reflective and least absorptive material of infrared (or heat) energy. High purity gold reflects up to 99% of infrared rays. Gold is also an excellent conductor of thermal energy or heat. Since many electronic processes create heat, gold is necessary to transfer heat away from delicate instruments. Gold alloy is the most tenacious and long-performing material available for protection of the ...
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... to be important about 20 years ago when scientists in Sweden and Norway first believed that acidic rain may be causing great ecological damage to the planet. The problem was that by the time that the scientist found the problem it was already very large. Detecting an acid lake is often quite difficult. A lake does not become acid over night. It happens over a period of many years, some times decades. The changes are usually to gradual for them to be noticed early. At the beginning of the 20th century most rivers/lakes like the river Tovdal in Norway had not yet begun to die. However by 1926 local inspectors were noticing that many of the lakes were beginning ...
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... to see just how dangerous acid rain is. If it really is dangerous, I was also interested to see what thing's people can do to help stop its effects. If we cannot stop the effects, I would atleast like to know something’s I can do to lessen the effects on our environment. What is acid rain? Acid rain is the name commonly given to the deposition of a cocktail of acidifying compounds to soils, surface waters and buildings. These compounds arise mainly from the combustion of fossil fuels. In some parts of the United Kingdom, natural ecosystems have a significant acid-neutralizing capacity and acid rain has little impact on them. In other parts, the neutralizing ...
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... Genome Projects current target date (Lemonick 46). But we should use genetic engineering in a proper way. Our goal should be to find areas where it is needed rather than try to misuse it for personal gain. Genetic engineering can provide medical benefits to humans, but limits have to be set. Our body contains one hundred trillion cells, inside most cells is a nucleus that contains a complete set of the body’s blueprints. Those blueprints are twisted into forty-six packets called chromosomes. Unravel a chromosome, and you get the long, thread-like molecule called DNA. Within the DNA are the blueprints, called genes, for which make proteins. The DNA ...
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