GENETICS AND EVOLUTION
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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two populations of finches that cannot produce viable offspring
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two populations of finches that have different feather colors
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two populations of salamanders that live in different lakes
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two populations of salamanders that have different tail lengths
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Detailed explanation-1: -For the example above, the finches on one island do not breed with finches from another island due to the physical barrier between them. Eventually, they will not mate due to changes in behaviors, or will not produce viable offspring due to changes in physiology.
Detailed explanation-2: -Species are kept distinct from one another by prezygotic and postzygotic barriers. These barriers keep organisms of different species from mating to produce fertile offspring, acting before and after the formation of a zygote, respectively. These barriers maintain the reproductive isolation of species.
Detailed explanation-3: -: the inability of a species to breed successfully with related species due to geographical, behavioral, physiological, or genetic barriers or differences.
Detailed explanation-4: -Behavioral isolation occurs when two populations that are capable of interbreeding develop differences in courtship rituals or other behaviors.
Detailed explanation-5: -Still other finches have medium-size beaks that can catch and grasp insects. Because they are isolated, the birds don’t breed with one another and have therefore developed into unique species with unique characteristics. This is called allopatric speciation.