Examlex
The process that streamlines spermatids into sperm is known as ________.
Natural Experiments
Observational study designs where the subjects are exposed to the experimental and control conditions that are determined by nature or by other factors outside the control of the investigators.
Cephalocaudal
A principle of growth and development where development proceeds from the head down through the body.
Proximodistal Development
A pattern of development where growth starts at the center of the body and moves towards the outer extremities.
Critical Period
A specific time in an organism's development during which particular abilities or characteristics are most easily learned or acquired.
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