They don't.: Teratogens are substances which are known to cause birth defects. You probably heard the term "environmental" used versus "genetic" with regard to factors causing human birth defects or disease. Intelligence is thought to be due to both genetic and environmental factors.
Answered 5/1/2018
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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