Question

Sharks, whales, and dolphins share similar features such as body shape and the position of fins. However, sharks have gills for breathing, while

whales and dolphins have lungs. These differences indicate that the organisms share a common ancestor for

Whales also possess a vestigial pelvic bone. The presence of the pelvis bone may indicate that whales

Answer 1

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Answer 2

Answer: Part a: Whales and sharks share a common ancestor for superficial characteristics Part b: The vestigial pelvic bone of whales and dolphins indicates that they descended

Explanation: .