Question

In Whales back leg bones are a vestigial structure what does this mean

A the whales ancestor had legs
B the leg bones were never used
C the leg bones still have a use

Answer 1

[AI-generated answer — Bot GPT 3.5]

The correct answer is A. The presence of vestigial leg bones in whales suggests that their ancestors had legs. Over time, through the process of evolution, these leg bones became reduced and nonfunctional as whales adapted to an aquatic lifestyle.