One reason that the majority of children prenatally exposed to nicotine are at high risk for learning and behavior problems is that the DD genotype is

A) rare.
B) the only gene that contributes to ADHD symptoms.
C) widespread.
D) impossible to study.

C

Psychology

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In the absence of __________ the fetus becomes a female

a. teratogens b. androgens c. estrogens d. norepinephrine e. progesterones

Psychology

Who was the theorist who originated the term "survival of the fittest?"

a. Herbert Spencer b. Charles Darwin c. Jean-Baptiste de Lamarck d. Richard Breland

Psychology