From the deepest to most superficial: pia mater, arahnoid, dura mater
Answer B did this a few ago
Answer:
I believe that this is balanced.
The forelimbs of all mammals are homologous traits, meaning that they originate from a common ancestral trait.
The correct answer is therefore C. Homologies (homologous traits), from the same common ancestor.
(To clarify, we know it is from a common ancestor because both bats and humans are mammals)
