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AssignmentMultiple Choice

Evolutionary Relationships

Question 1 • Science 8

A human and a bat share a common ancestor. According to the article, which evidence supports this relationship?

Answer
A
Their teeth have the same structure and function.
B
Their arm bones have the same structure and function.
C
Their teeth have the same structure, but not function.
D
Their arm bones have the same structure, but not function.

Explanation

A human’s arm and a bat’s wing have corresponding bones arranged in a similar structure, which supports that they inherited this pattern from a common ancestor. The structures serve different functions: humans use their arms for tasks such as grasping, while bats use their wings for flying. Therefore, the evidence is that their arm bones have the same structure but not the same function.

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