Bottlenose Dolphins Breathe Air but Can Sleep in the Ocean

question 25

Multiple Choice

Bottlenose dolphins breathe air but can sleep in the ocean because ________.

• A) they sleep for only 30 minutes at a time, which is the maximum interval they can cease breathing
• B) they fill their swim bladder with air to keep their blowholes above the surface of the water while they sleep
• C) they move to shallow water to sleep, so they do not need to swim to keep their blowholes above the surface of the water
• D) they alternate which half of their brain is asleep and which half is awake

---

Definitions:

Anxiety

Anxiety is a psychological and physiological state characterized by cognitive, somatic, emotional, and behavioral components, leading to worry, discomfort, and fear about perceived threats.

Generalized Anxiety Disorder

A mental health disorder characterized by persistent and excessive worry about various aspects of life, beyond what might be expected from daily stresses.

Continually Tense

Experiencing persistent and ongoing feelings of tension or stress, without relaxation.

Apprehensive

Feeling anxious or fearful that something bad or unpleasant will happen.