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Unformatted text preview: development of social and language skills to apply increasingly better stone tool technology to trap and kill the largher animals. Hunting contributes to the estimated extinction of 15,000 to 30,000 species a year. Fish stocks are being depleted by overfishing. Commercial trade causes exploitation of tigers, cheetahs, leopards, jaguars, etc. for furs; sharks for fins; rhinoceros for rhino horn powder; elephants for tusks for ivory; and cacti for gardeners. A major cause of extinction is the loss of habitat to support a species. The habitat for a species may be totally destroyed through natural events or human activities. Habitats may be fragmented into small pieces that cannot support the population. By 2010, very little undisturbed rain forest will exist outside of national parks....
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This note was uploaded on 11/29/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.
- Fall '10