name at least 2 extinct species that share a close evolutionary relationship with humpback whales. explain the similarities and differences that exist between these species and humpback whales. is the fossil record complete for humpback whales. explain your answer.

Indohyus and Pakicetus.

Explanation:

Indohyus and Pakicetus are the extinct species that share a close evolutionary relationship with humpback whales. The differences between Indohyus, Pakicetus and humpback whales is that both Indohyus and Pakicetus have legs and are land animals whereas whale do not have legs and lives in the ocean. The similarities between Indohyus, Pakicetus and humpback whales is that the head of Indohyus and Pakicetus had the distinctive long skull shape of a whale's.