What distinguishes phocids from otariids in diving behavior?

What is the primary reason hyperthermia is dangerous for marine mammals?

Bradycardia during dives is part of the dive response that conserves oxygen.

Which of the following is TRUE about hearing adaptations in baleen versus toothed whales?

Alveolar collapse is an adaptation to reduce nitrogen absorption during deep dives.

What is the primary function of bradycardia during a marine mammal’s dive?

Beaked whales are most vulnerable to predation while at depth.

Most marine mammals exhibit spontaneous ovulation rather than induced ovulation.

Marine mammals can actively control gas exchange during a dive.

The penis of cetaceans is generally rigid and fixed in direction.