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Ferns are distinguished from their relatives by having megaphylls.
Pineal Body
A small endocrine gland in the brain that produces melatonin, a hormone that regulates sleep patterns.
Melatonin
A hormone produced by the pineal gland in the brain, responsible for regulating sleep-wake cycles.
Biological Clock
An internal mechanism in living organisms that controls the timing of various biological functions, such as sleep-wake cycles, reproductive cycles, and metabolism.
Atrial Natriuretic Peptide
A hormone produced by the heart that helps regulate blood pressure and fluid balance.
Q18: All of the following are features of
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Q65: Two of the original four cells in