... actually stop and think about it, life is one big game of chance. It is by chance that we are born, that we continue to survive, and that we will eventually die. Some people feel that this cycle occurs do to the will of God, others, like Charles Darwin believe that it happens based on chance or natural selection. Whatever you believe or disbelieve, life cannot be planned. No matter how hard a person attempts to "plan" their path in life, it is by chance and luck where that path takes us. Darwin's career was also based on chance, not planning. Darwin never planned to become a scientist or the father of natural selection. It was by pure chance that he obtai ...
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... this method is based on the assumption that, for each women, there is a rhythmic pattern of menstruation and ovulation that can be identified by keeping a careful record of the dates of menstruation. A second assumption is that ovulation occurs 14 days before the onset of the next menstruation. The rhythm method is the most commonly used of the natural methods. To be used successfully a record should be kept for at least six menstrual cycles. The fertile period is then defined by a set of rules for example: The length of the shortest cycle less 18 days marking the start of the fertile period and the length of the longest cycle less 11 days marking the end of the ...
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... a lack of respect for the individual animal's integrity and that the application of such technology will result in undesirable shifts in our view of how we may treat animals and how radically we can meddle with nature in general. Furthermore, it is stressed that, whatever potential uses it may be put to at some future stage, the technique raises a long string of ethical problems. In addition, it may be feared that within a number of years the development and application of animal techniques will lead to the testing, development and application of human . Though this notion seems very unlikely to occur within the span of the next few years, but the possibi ...
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... variey of sources Radiation: from the cosmic and radioactive isotope decays UV light: there were no protective ozone layer and thus immense heat. Electrical discharge from the never ending lightning caused chemical reactions to occur very often and there was also another source of heat from the young earth crust which was volcanically active. For most chemical reactions to take place, a spark of electricity is needed, and this was provided by the lightning in the atmosphere. Amino acids basically consist of hydrogen, nitrogen, oxygen and carbon. Due to all of the lightning chemical reactions took place between molecules of N2 and H2, thus these molecules formed ...
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... and in some other countries. Pro-life groups that oppose free access to abortion have considerable political power, and were able to have all human embryo research banned by the Reagan and Bush administrations in most of the 1980’s and the 1990’s (religoustolerance). Although the ban was lifted during the first days of Bill Clinton’s presidency, in 1997 he sent a bill to congress marked “immediate consideration and prompt enactment” stating that it would be illegal to create a human clone whether in private or public laboratories. Along with the US ban, nineteen European countries including Denmark, Estonia, Finland, France, Greece, ...
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... in an optical-cavity. This allows us both to make more intense , as well as select of a particular colour (or energy). ¨ travels at a speed of 2.99792458x10^{8} ms^{-1} ¨ When passing though matter, is slowed down by brief interactions, and so appears to travel more slowly. ¨ This "slowing down" is accounted for by the index of refraction of the matter. 's properties can at first seem confusing and inconsistent because of the unique nature of light: light has the properties of both a wave and a particle. In some situations, light's behavior is more easily explained by thinking of light as a particle. In other situations, its behavior can only be explained ...
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... ozone and form "thinning" or "holes." This is catastrophic because they are bonded very strongly 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 t ...
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... hydroelectric plants were being built, the simultaneous development of larger and more cost-efficient steam-power plants made it obvious that only very large and costly hydroelectric installations could compete effectively, and that the federal government would have to assume a major share in their construction. Motivated by the search for the multiple use of water resources, including navigation, flood control, and irrigation, in addition to power production, the Tennessee Valley Authority, or TVA, started government participation in large-scale waterpower development in 1933. Most major installations depend on a large water-storage reservoir upstream of the ...
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... Am artificially produced zona pellucida is added so embryonic development can continue. Now you have exact copies of the same genetic makeup in two to eight separate petri dishes. Even though this process sounds simple enough it has never fully worked because of abnormalities that occur like if the embryo is developed by two sperm cells the chromosome count is wrong. Another is as the cells duplicate they usually do not make it passed the 32-cell stage or 64 because of abnormalities in the environment or just because the process is not natural. The real reason why it does not work yet is not clearly known at the moment. Since became such a distinct possibility wi ...
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... the fear of nuclear attack was constantly on the minds of the American people and the government. The government therefore developed a corporation called RAND that they put in charge of making a network that could be protected from nuclear attack and could guarantee that we could still fire our own nuclear missiles in our defense. Soon major schools and corporations threw their hats into the race for a network in which information could be sent electronically. Throughout the seventies a couple of schools developed their own network in which they could communicate with each other and devices were designed to make networks within offices possible using a techn ...
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