What are cetaceans?
Q: What are cetaceans?
A: Cetaceans are a group of mammals that includes whales, dolphins and porpoises.
Q: How do we know that cetaceans evolved from land animals?
A: We can tell that cetaceans evolved from land animals because they need to breathe air from the surface, their fins resemble the limbs of land mammals and their spines move vertically like a running mammal instead of horizontally like fish.
Q: Where were recent discoveries made about the transition of cetaceans from land to sea?
A: Recent discoveries about the transition of cetaceans from land to sea were made in Pakistan.
Q: What does it mean when something is a leviathan?
A: A leviathan is an enormous creature or force, usually referring to a large sea creature such as a whale or other marine animal.
Q: How did scientists uncover stages in the transition of cetaceans from land to sea?
A: Scientists uncovered stages in the transition of cetaceans from land to sea by making recent discoveries in Pakistan.
Q: What type of movement do fish typically have compared with mammals?
A: Fish typically have horizontal movement while mammals have vertical movement.
