Evolution - True or false

Whales once had legs and could walk on land. A prehistoric mammal, Ambulacetis, known as the walking whale, lived around 50 million years ago and could both walk and swim. As whales adapted to aquatic life, they lost their legs, evolving into the familiar shape we know today with flippers and flat tails through natural selection.

What adaptations did early whales undergo as they adapted to life in the sea?

• Developed legs

• Evolved paddle-like flippers

• Grew larger teeth

• Became warm-blooded

Describe the changes in the tail of early whales as they evolved.

• It became longer

• It became flatter

• It disappeared

• It became more muscular