EVOLUTION
EVIDENCE FOR EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A dolphin fin and a shark fin
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Human fingernails and monkey fingernails
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Front leg of a cat and the wing of a bat
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The wing of a bumble bee and the wing of a bird
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Detailed explanation-1: -Homologous organs are those which are similar in morphology and anatomy and genetic but perform different functions such as arms of human beings, forelimbs of a cat and wings of a bat.
Detailed explanation-2: -Bird and bat wings are analogous-that is, they have separate evolutionary origins, but are superficially similar because they have both experienced natural selection that shaped them to play a key role in flight. Analogies are the result of convergent evolution.
Detailed explanation-3: -1: Homologous structures: Bat and bird wings are homologous structures, indicating that bats and birds share a common evolutionary past. Notice it is not simply a single bone, but rather a grouping of several bones arranged in a similar way.
Detailed explanation-4: -The wing structure of bats and birds differs. Birds have feathers projecting back from lightweight, fused arm and hand bones. Bats have flexible, relatively short wings with membranes stretched between elongated fingers.
Detailed explanation-5: -Organs that have the same internal structure but perform different functions are called homologous organs. The presence of homologous organs in different organisms indicates that they have evolved from a common ancestor. Example: forelimbs of humans and lizards.