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 was the unique ability of Ambulacetis?

• It could fly and swim.

• It could walk on land and swim in water.

• It could only swim.

• It could only walk on land.

Why did early whales lose their legs?

• They needed to run faster on land.

• They evolved to climb trees.

• They adapted to life in the sea.

• They preferred flying.

What evolutionary changes helped whales adapt to swimming?

• Development of wings.

• Evolution of paddle-like flippers.

• Formation of sharp claws.

• Growth of longer legs.

What happened to the tails of early whales as they evolved?

• They disappeared completely.

• They became longer and more flexible.

• They became flatter and more suited for swimming.

• They developed spikes for defense.

What is the modern shape of whales a result of?

• Random genetic mutations.

• Natural selection and adaptation to aquatic life.

• Sudden environmental changes.

• Domestication by humans.