BIO Exam 4 Study Guide

Front

What is the only extant pinniped with tusks in both males and females?

Back

Walrus (Odobenidae) is the only extant pinniped with tusks in both males and females, used for social displays, hauling out of water, and moving ice.

Front

What is the primary function of the phonic lips in odontocetes?

Back

The primary function of the phonic lips in odontocetes is sound emission control.

Front

What role does hair/fur play in marine mammals?

Back

Hair/fur in marine mammals creates a boundary layer of air, which helps in insulation.

Front

Where are projected sea surface temperature (SST) increases greatest?

Back

Projected SST increases are greatest in the Northern Hemisphere.

Front

When did placental mammals originate?

Back

Placental mammals originated approximately 100 million years ago.

Front

What adaptations do walruses have for their environment?

Back

Walruses have a thick layer of blubber and thick skin, which helps them survive in cold waters.

Front

How do odontocetes produce sound?

Back

Odontocetes produce sound using their phonic lips, which control the emission of sound waves.

Front

What is the significance of blubber in marine mammals?

Back

Blubber provides insulation, energy storage, and buoyancy for marine mammals.

Front

What is the primary diet of walruses?

Back

Walruses primarily feed on benthic invertebrates, particularly clams.

Front

How do marine mammals regulate their body temperature?

Back

Marine mammals regulate their body temperature through insulation provided by blubber and fur.