Sperm-Egg Interactions Are Species-Specific in Sea Urchins,but Not in Mammals

question 18

Multiple Choice

Sperm-egg interactions are species-specific in sea urchins,but not in mammals.What might be one reason for this difference?

• A)Other kinds of signals serve similar functions in mammals.
• B)Sperm-egg recognition relies on egg cytoplasmic components in mammals.
• C)Sperm have evolved to become more selective in mammals.
• D)Sea urchin fertilization occurs in open ocean.

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Definitions:

REM Sleep

A stage of sleep characterized by rapid eye movement, vivid dreams, and increased brain activity.

N3 Sleep

The deepest stage of non-REM (Rapid Eye Movement) sleep, characterized by delta brainwaves and considered crucial for physical restoration and memory consolidation.

Heredity And Environment

The two main factors that influence individual development, including genetics (heredity) and external factors (environment).

Rapid Eye Movements

Are quick, jerky movements of the eyes that occur during REM sleep, a stage associated with vivid dreaming.