AP BIOLOGY

Detailed explanation-1: -The correct answer is B. The humans forearm is much like a bat wing, because all of our tendons and liniments.

Detailed explanation-2: -Although both the wing and arm are morphologically different and perform different functions but anatomically they resemble each other. They show similarities in the pattern of bones of forelimbs. They have the same set of bones i.e. humerus, radius, ulna, and phalanges.

Detailed explanation-3: -Homologous Structures Examples Both the human arm and the cat arm have a single bone in the upper arm, which we call the humerus, followed by two bones in the forearm–the radius on the more medial side and the ulna on the more lateral side.

Detailed explanation-4: -If you look at the skeletal structure of a bat’s wing, it is almost identical to that of a human hand and arm, only elongated and much, much smaller. Bats also have a thin membrane of elastic-like skin that stretches across the fingers to form the wing.

Detailed explanation-5: -Bones of animals are strong and mostly dense, but they don’t all have the same structure. Unlike human bones, birds have a lot more empty space inside their bones. Bird and bat bones also look smaller and more delicate than human bones. This was thought to make both bird and bat bones lighter so they can fly.