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

that whales are related to shark

Answer 2

The given question can be answered if you know the anatomy of sharks, whales, and dolphins. Sharks are known to have pelvic bones. Therefore, the answer here would be that ‘whales are related to sharks’.

Because whales also have a vestigial pelvic bone, the can be easily related to sharks. Vestigial pelvic bone is a part which is not used any longer by the whales.

Even then this is what their pelvic bone indicates. And it can be concluded that they have the same ancestors.