Jill is 5 years old. She has been diagnosed with ADHD and shows signs of learning disabilities. Her doctor suggests that Jill's problems could be the result of prenatal exposure to , though he stresses that the link is not straightforward at this time.

Jill's problems -characterized by learning disabilities due to ADHD- could be the result of prenatal exposure to behavioral teratogens, though he stresses that the link is not straightforward at this time.

Explanation:

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ADHD is an Attention Deficit Hyperactivity Disorder, a rare condition that has been linked to hereditary and environmental factors, such as exposure to teratogens.

Hereditary factors include genetic and chromosomal abnormalities, which can be passed from parent to child.

Pre-natal environmental factors are all those to which the mother has been exposed and which affect the normal development of the fetus. Among these factors are behavioral teratogens.

Substances such as nicotine, alcohol, drugs of abuse, and polychlorinated biphenyls (PCBs) have been identified as behavioral teratogens, which could possibly have produced ADHD in Jill.

The reason the doctor says the link between behavioral teratogens and Jill's ADHD is not straightforward at this time is because multiple factors can produce the disorder and must be considered through parental questioning and clinical testing.

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ADHD link

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

explanation: