Examlex
________ is often the least available nutrient in terrestrial environments.
Neural Tube
The tubular structure formed early in the embryonic stage from which the central nervous system (brain and spinal cord) develops.
Embryonic
Pertaining to the earliest stage of development in plants and animals after fertilization, before becoming a fetus.
Human Childhood
A developmental stage in humans characterized by growth, learning, and socialization from infancy through adolescence.
Developmental Period
A phase in an individual's life during which significant growth, learning, or development occurs.
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