Biology

The correct answer is: A. Four limbs.

1. Analyze each option using the cladogram:

Hair: The trait “Hair” appears on the cladogram after the split from the turtle. This means the ancestral species before this split did not have hair. So this option is incorrect.

Sharp teeth and retractable claws: “Sharp teeth” is a trait that branches off after the horse, and “Retractable claws” branches off after the wolf. So the earlier ancestral species did not possess these characteristics. This option is wrong.

The ability to pur...