With increasing transportation throughout the world, humans have introduced many

Question

With increasing transportation throughout the world, humans have introduced many species onto islands where previously they did not occur. For example, Polynesian rats were spread to many islands in the Pacific Ocean by Polynesians over the last millennium. Introducing new species onto islands often (PLEASE ALSO EXPLAIN WHY!)

   A. leads to the extinction of native species.

   B. increases the mutation rate of the introduced species.

   C. decreases the strength of natural selection on the native species.

   D. decreases genetic drift of the introduced species on the island.

Explanation / Answer

C- decreases the strength of natural selection on the native species.

Introduced new species in a ecosystem are known as invasive species. invasive species sometimes have negative effect on a local ecosystem. but most of the invasive species are not dangerous. infact some serve as pestisides and some othr might effect the strength of natural selection on native species.

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