Which of the following is strong evidence for an environmental contribution to a behavior?
a. Adopted children resemble their biological families with regard to a trait.
b. Monozygotic twins have a higher concordance rate than do dizygotic twins.
c. Dizygotic twins have a lower concordance rate than do monozygotic twins.
d. Adopted children resemble their adopted families with regard to a trait.
e. None of the above are correct.
Question 2
Microdialysis is not done in humans for research purposes owing to
a. the prohibitively high cost of the procedure has led most insurers to refuse to pay for such research.
b. difficulty in obtaining human volunteers.
c. problems related to the surgical implantation of probes into human brain.
d. ethical problems because the procedure is invasive.
e. the levels of transmitters within human brain are below the level of detection of the technique.
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