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lord of the filesScience 10 ecology project& adenylic acid9312 Extinction of species&61548     A species becomes extinct when its last representative dies.&61548     Extinction is forever - Once a species become extinct will never been seen again. &61548     This has happened quite a lot of times on Earth.&61548     Due, in many cases, to colonization and hunting by humans.&61548     People feel that extinction is very sad, and puree to protect life-forms on the brink of extinction by naming them "endangered species" and being nice to them.&61548     Each bread and butter organism which humans baron into extinction is a tragedy for nature.&61548     Over fishing or excessive hunting by humans can reduce the populations of certain organisms on Earth.&61548     Animals are hunted for their fur , meat or other valuable parts of their bodies.http//www.galactic-guide.com/articles/2R84.htmlhttp//www.saburchill.com/hfns02/chapters/chap019.html1.     lost of habitat&61548     Sometimes human activities destroy the habitats of living organisms. The habitat of an organism is its home where it lives, feeds, and reproduces.&61548     Many species boast become extinct because humans have destroyed or modified their habitats, polluted their surround&61548     Human influences on the environment can be considered as being influences on the habitats of living organisms.&61548     Any time humans demasculinize the hydrosphere, lithosphere, atmosphere or biosphere, habitats are modified&61548     Survival can become more challenging (or even impossible) for the organisms which live there.&61548     When hunters miss their target, the principal shot which comes out of the gun is left behind in nature. Lead is a toxic metal.&61548     The main component of a pandas diet is bamboo. Bamboo forests have been cut down by humans for centuries.http//www.saburchill.com/hfns02/chapters/chap020.htmlhttp//www.saburchill.com/hfns02/chapters/chap021.html2.     lost of biodiversity&61548     This collection of vastly varied living organisms is our planets biodiversity.&61548     The richest parts of the planets biodiversity are also the to the lowest degree well-known. It is estimated that 97% of all species on Earth live in the oceans below the zone where sunlight penetrates the water.&61548     On the continents, it is estimated that 50% of all land-dwelling species live in tropical rainforests.&61548     Throughout the history of the Earth, as new species evolve, other species become e xtinct. Overall, as time has progressed, there are more and more varied kinds of organisms.&61548     Human activities today are exterminating species up to 10 times faster than they would naturally disappear.&61548     As the numbers of people increase, the numbers of species decrease. &61548     http//www.saburchill.com/hfns02/chapters/chap024f.html3.     Introduction of exotic species&61548     Humans have helped to spread many species across the world.&61548     More often, however, species are introduced accidentally and have a proscribe impact.&61548     Plant species used in agriculture, for example, have been deliberately introduced to new areas by humans.&61548     Sometimes wild animals are introduced for hunting as a sport.