Birds and humans are theorized to have a common ancestor because they have homologous structures. Which eviden

Question

Birds and humans are theorized to have a common ancestor because they have homologous structures.

Which evidence best supports this theory?

They both have tails as embryos.
They each have vestigial structures.
They have analogous structures.
They have different forms as adults.

GPT-5 mini · Answer

They both have tails as embryos.

Explanation: Similar embryonic structures (like a tail) indicate homologous developmental origins and common ancestry. Analogous structures and different adult forms do not show common descent; vestigial structures can also suggest ancestry but the embryonic tail is the strongest direct homologous evidence.

Birds and humans are theorized to have a common ancestor because they have homologous structures.

Which evidence best supports this theory?

They both have tails as embryos.
They each have vestigial structures.
They have analogous structures.
They have different forms as adults.

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Birds and humans are theorized to have a common ancestor because they have homologous structures. Which evidence best supports this theory? They both have tails as embryos. They each have vestigial structures. They have analogous structures. They have different forms as adults.

All Answers 1

Submit Your Answer

Birds and humans are theorized to have a common ancestor because they have homologous structures.

Which evidence best supports this theory?

They both have tails as embryos.
They each have vestigial structures.
They have analogous structures.
They have different forms as adults.