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

Answer:

Explanation:

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. Sharks and dolphins are similar in construction because they need their parts to complete many of same function

Answer 2

Answer:

The first space is "body structure, but their breathing structures evolved from different ancestors"

The second space is "evolved from organisms with legs"

Explanation:

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