In a comparison of birds and mammals, the condition of having fou...

Question

In a comparison of birds and mammals, the condition of having four limbs is
a. a shared ancestral character.
b. a shared derived character.
c. a character useful for distinguishing birds from mammals.
d. an example of analogy rather than homology.

Accepted Answer

Hello everyone here we have a question that says some mammals developed for unlike other vertebrates such as amphibians and reptiles, which have retained their ancestral trait. The development of fur and mammals like bears is an example of a derived character. Be a shared primitive character of all vertebrates all vertebrates do not have. For so B. Is incorrect. See a shared ancestral character of all vertebrates. That is incorrect. Not all vertebrates have for D. A unique character for mammals. While it is a unique character for mammals, it is the best example of a derived character and this is because it is derived trait which developed in the mammals lineage. Thank you for watching. Bye.

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