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Question
Which of the following structures is homologous to the forelimbs of birds?
Which of the following structures is homologous to the forelimbs of birds?
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Solution
The correct option is C Forelimbs of bats
Homologous structures are derived from a common ancestor. These structures are adapted to perform different functions, thus they support divergent evolution. Anantomically, the forelimbs of bats consist of bones which make up the fingers and arms. These are covered by a flap of skin to make its wings. Whereas bird wings consist of feathers extending all along right through the arm. However, anatomically it is similar to the bone structure seen in the bats. Superficially, these structures appear analogous implying that they are not inherited from a common ancestor. However, anatomically these structures are homologous as they have been inherited from a common ancestor who also had forelimbs.
Homologous structures are derived from a common ancestor. These structures are adapted to perform different functions, thus they support divergent evolution. Anantomically, the forelimbs of bats consist of bones which make up the fingers and arms. These are covered by a flap of skin to make its wings. Whereas bird wings consist of feathers extending all along right through the arm. However, anatomically it is similar to the bone structure seen in the bats. Superficially, these structures appear analogous implying that they are not inherited from a common ancestor. However, anatomically these structures are homologous as they have been inherited from a common ancestor who also had forelimbs.
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