... A given kind of organism may evolve only when it occurs in a variety of forms differing in hereditary traits, that are passed from parent to offspring. By chance, some varieties prove to be ill adapted to their current environment and thus disappear, whereas others prove to be adaptive, and their numbers increase. The elimination of the unfit, or the "survival of the fittest," is known as Natural Selection because it is nature that discards or favors a particular being. Evolution takes place only when natural selection operates on apopulation of organisms containing diverse inheritable forms. HISTORY Pierre Louis Moreau de Maupertuis (1698-1759) ...
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... used to monitor a patients vital signs are among the systems at risk. Australian hospitals believe that as many as 60% of their machines may not work properly when the date rolls over. Local testing has identified the ultrasound machines and central monitors which have exhibited year 2000 failures. There could be significant threats to personal safety, for example if an ultrasound wrongly calculated the size of a faetus or administered radiation therapy incorrectly. Also people with heart pace makers could face the possibility of them failing. Bank accounts could be wiped off the records and ATM's could swallow cards thought to be expired. Computers controlling h ...
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... means that the 15% represents about 4.2 million tons of toxic waste. Toxic wastes, which are dumped in improper sites, can seep into underground water supplies and contaminate huge areas. If the land that is intoxicated supports plant life, most of the plants and trees will die off. If humans occupy the area, it could cause serious illness or death. For example, an area by Niagara Falls (US side) was used during the 1930s by a chemical company to dump its waste. Most of them were hazardous, and the containers that held the chemicals later (after the company had gone out of business) began to leak. The chemicals spread for miles killing off plants and causing c ...
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... of knowledge. Also Japanese the teaching of computer science has been developed in the same period. During 1955 to 1959, some universities developed their own computers. They organized short courses. Computer technology comes from the U.S. to Japan. Usually a technology is developed in the U.S.. After that, it comes to Japan so Japanese is late at all and most manuals are written in English so it is easy to lean computer for people who speak English; however, most Japanese people who live in Japan cannot understand English so they have to translate English to Japanese to understand the manuals. It needs much time. Usually Japanese universities teach computer to ...
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... Often exceeds 30 m (100 ft) in length, and the smallest shrews, mice, and bats are often less than 5 cm (less than 2 in) in length. In many mammals the color of the skin or fur blends with the animal’s natural surroundings. In others there is great contrast with the natural surroundings to favorvisual signals that provide information about theidentity of a species, and about the gender, age, orsocial status of an individual. The skin also functions as a sensory and excretory organ and contains specialized glands. Mammary glands, which are present in fully developed form in all adult female mammals. Aquatic mammals, such as whales, dolphins, and sea c ...
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... still young in age has grown rapidly, spreading to countries world wide and connecting 50 million users. With its popularity, it is incumbent upon our society to recognize how the Internet works and to be aware of its advantages as well as disadvantages. While seemingly high tech the Internet concept is rather simple. Computers speak to one another and send information. This is accomplished by sending and receiving electronic impulse, and then decoding them into a message. In order to communicate with one another they are linked up in a network. They are then able to access information from thousands of other computers. The network acts like one large computer s ...
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... into phylums and classes. ECHINODERMS Echinoderms are marine invertebrate animals of the phylum Echinodrmata, having external skeletons of calcareous plates just under the skin, no head, and a water vascular-system with tube feet. Echinoderms are radially symmetrical, lack specialized ecretory organs, and reproduce sexually. Echinoderms have the ability to regenerate lost or injured body parts. Starfish: Starfishes are free-living echinoderms that have a flat, star-shaped or pentagonal body, usually with a continuous disc that has five or more ray-like extensions called arms. Tube feet are located in an open furrow along the underside of the arms. These ar ...
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... The British government has recognized that sulfur emissions from power plants in the United Kingdom are contributing to acid deposition in Scandinavia. Canadian emissions contribute substantially to in the northeastern United States, for example, and much of the sulfur falling in eastern Canada is believed to originate in the United States. In 1986 the U.S. National Academy of Sciences acknowledged that from U.S. sources had become a serious problem in the eastern United States and Canada. Although the Canadian government has agreed to reduce sulfur dioxide emissions, the United States has not placed limitations on its sulfur emissions that may drift into Ca ...
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... the ability to make copies of, or replicate, itself. ? They must have a need for a "host," or functional program to which it can attach. ? The virus must do some kind of harm to the computer system or at least cause some kind of unexpected or unwanted behaviour. Sometimes es just eat up memory or display annoying messages, but the more dangerous ones can destroy data, give false information, or completely freeze up a computer. The Stealth_c virus is a boot sector virus, meaning that it resides in the boot sectors of a computer disk and loads into memory with the normal boot-up programs. The "stealth" in the name comes from the capability of this virus to possibly ...
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... and is the first example of a true global village. Unfortunately for regular users of the Internet, much like the real world, criminals exist on the Internet as well. "Hackers," the computer wizards who use their knowledge for evil, are rampant on the Internet. Sometimes they do seemingly harmless acts, such as just going into a computer system and observing, but at other times, they steal, destroy or alter data. On some occasions, these cyber-felons perform even more malicious acts, such as infecting systems with "viruses," computer programs that "infect" the systems by latching onto other programs and eventually destroying them. Another favorite activity of the ...
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