Some Birds Must Return to Roost as Darkness Approaches

question 13

Multiple Choice

Some birds must return to roost as darkness approaches. This is because their eyes contain

• A)cones, but no rods.
• B)rods, but no cones.
• C)too many cones.
• D)too many rods.
• E)more rods than cones.

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Definitions:

Caffeine

A stimulant commonly found in coffee, tea, and other beverages, known for enhancing alertness and temporarily warding off drowsiness.

Caffeine

A stimulant found in coffee, tea, and various sodas and energy drinks, known for its ability to temporarily ward off drowsiness and restore alertness.

Stimulant

A substance that raises levels of physiological or nervous activity in the body, often used therapeutically to increase alertness or physical performance.

Depressant

A substance that reduces the functioning of the nervous system, often used to decrease anxiety and induce sleep.