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Define null hypothesis.
Teratogens
Harmful agents in the prenatal environment, which can have a negative impact on prenatal development or even cause birth defects.
Environmental Factors
External elements, including physical, chemical, and biological factors, that can influence living organisms or ecological systems.
Developmental Psychology
The study of how humans grow, develop, and change throughout the life span.
Gerontology
The study of the social, psychological, cognitive, and biological aspects of aging.
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