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

The condition of birds and mammals having four limbs is a shared ancestral character because the structure of the limbs are similar in both the cases.

The forelimbs of the bird are modified into wings to aid flying.The hind limbs are modified into feel and claws.

These are homologous structures to the hands and feet in mammals.

That means they have a common origin, and hence are shared ancestral character.

PhantomWisdom PhantomWisdom · Answer 2 · 2022-03-15T14:11:41+01:00

In a comparison of birds and mammals, having four limbs is a shared ancestral character.

So, option a. is correct.

Mammals

Mammals are a class of animals distinguished by the presence of mammary glands, which produce milk for females to feed their young, a neocortex, fur or hair, and three middle ear bones.

A mammal is an organism that displaces oxygen, has a skeleton, and grows hair at some point in its life.

In a comparison of birds and mammals, having four limbs is a shared ancestral character.

So, option a. is correct.

Find out more information about mammals here:

https://brainly.com/question/20261938?referrer=searchResults