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