Select the correct answer from each drop-down menu. 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
ANSWER OPTIONS
-body structure, but their breathing structures evolved from different ancestors
-both body structure and breathing structure
- body structure but their breathing structures evolved from different ancestors

Whales also possess a vestigial pelvic bone. The presence of the pelvis bone may indicate that whales
ANSWER OPTIONS
- have legs inside their bodies
- evolved from organisms with legs
-will have legs in the future