Flashcard on Marine Mammals

Front

What is echolocation?

Back

Echolocation is a biological sonar used by several kinds of animals, including marine mammals, to navigate and locate prey by emitting sound waves and interpreting the echoes that return.

Front

How do marine mammals analyze echoes in echolocation?

Back

Marine mammals analyze the echoes to determine the distance, size, shape, and even the texture of objects in their environment.

Front

When did mammals evolve from reptiles?

Back

Mammals evolved from now-extinct reptiles approximately 200 million years ago.

Front

What type of teeth do porpoises have?

Back

Porpoises have flattened teeth, which are adapted for their diet.

Front

What is the weight range of a male sea otter?

Back

A male sea otter typically weighs between 25-35 kg.

Front

What do mammals have instead of feathers to retain body heat?

Back

Mammals have hair to retain body heat.

Front

What is the primary function of blubber in marine mammals?

Back

Blubber serves as insulation to help maintain body temperature in cold water.

Front

What adaptations do marine mammals have for swimming?

Back

Marine mammals have streamlined bodies, flippers, and in some cases, a layer of blubber for buoyancy and insulation.

Front

What is the significance of the blowhole in marine mammals?

Back

The blowhole is a specialized nostril located on the top of the head, allowing marine mammals to breathe easily while swimming.

Front

How do marine mammals communicate underwater?

Back

Marine mammals communicate using a variety of sounds, including clicks, whistles, and songs, which can travel long distances underwater.