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Question
Statement 1: Evolution of different species in a given geographical area starting from one point and radiating to other geographical areas is adaptive radiation, which falls under divergent evolution.
Statement 2: Analogous organs like wings of insects, bats and birds are the result of divergent evolution
Statement 1: Evolution of different species in a given geographical area starting from one point and radiating to other geographical areas is adaptive radiation, which falls under divergent evolution.
Statement 2: Analogous organs like wings of insects, bats and birds are the result of divergent evolution
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Solution
The correct option is B Statement 1 is correct and statement 2 is incorrect
Most of the scientists belive adaptive radiation is a type of divergent evolution. Evolution of different adaptive functional species from a common origin stock in a given geographical area and radiating into varying geographical areas occupying different niches is called adaptive radiation. Both adaptive radiation and divergent evolution are quiet same, the only difference is, adaptive radiation is a relatively faster process than divergent evolution. Few of the famous examples of adaptive radiation are Darwin finches and Australian marsupials.
Analogous organs are the organs which show similar function but the origin and structural details are different. For example- insect wings are analogous to bird wings,so though the basic structure of both are different, yet both have the same function. The formation of such analogous structures are a result of convergent evolution and not adaptive radiation.
Most of the scientists belive adaptive radiation is a type of divergent evolution. Evolution of different adaptive functional species from a common origin stock in a given geographical area and radiating into varying geographical areas occupying different niches is called adaptive radiation. Both adaptive radiation and divergent evolution are quiet same, the only difference is, adaptive radiation is a relatively faster process than divergent evolution. Few of the famous examples of adaptive radiation are Darwin finches and Australian marsupials.
Analogous organs are the organs which show similar function but the origin and structural details are different. For example- insect wings are analogous to bird wings,so though the basic structure of both are different, yet both have the same function. The formation of such analogous structures are a result of convergent evolution and not adaptive radiation.
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