Answer:
C
Explanation:
The answer is C i think but i ould be wrong
The alveoli. These little air sacs are found on the end of the bronchioles and are the place where oxygen enters the blood and the carbon dioxide leaves.
They concluded that horses evolved with the emergence of grasslands and an increase of predators. The digits of their early Eocene ancestor evolved into hooves.
Molecules with similar shapes have similar biological effects, because shape (structure) dictates effects (functions).