Question

14. The illustration shows forelimb bones for a human,

whale, and bat.

What is similar and different about the three forelimbs?

Answer 1

Answer: The forelimb of human, whale and bat have a common fundamental anatomical plan and similar embryonic origin (one large upper arm bone, two small lower bones, carpals and metacarpals). The main difference of the forelimb of this 3 mentioned is in their various function

Explanation: the forelimb of human, whale and bat have a common fundamental anatomical plan and similar embryonic origin but with varied functions. They have the larger upper arm bone as the humerus, while the 2 smaller lower bones are ulnar and radius and the carpals and metacarpals in the wrist and hand. The human fore limb function in grasping, whale uses it forelimb (flippers) in swimming while bat uses theirs in flying.

Answer 2

Similarities between the forelimb bones for a human, whale, and bat is that it has one large upper arm bone and two small lower bones. The main difference of the forelimb of human, whale, and bat in their functions.

Step-by-step explanation:

Humerus is the large upper arm bone which is present in the human, whale, and bat while the radius and ulna are the two small bones which are present at lower side of the forelimb. These forelimbs are also different from one another in respect to function. The forelimb of whale helps in swimming, in bat it helps in flying while in humans it is used to hold things.