Evidence that environmental factors play a role in the etiology of schizophrenia is that the concordance rate for identical twins is
A) greater for males than for females.
B) much less than 100%.
C) much more than 50%.
D) more than for dizygotic twins.
E) greater among cocaine users.
Answer: B
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Chromosomal abnormalities occur when a zygote's cells have:
the usual 46 chromosomes. gametes with 46 chromosomes. more or fewer than the usual 46 chromosomes. the usual 46 chromosomes with damage to the gametes.
Bryan finds his girlfriend Christina far more attractive as she
leaves the darkened movie theater than before they entered. What might account for Bryan's reaction? A) Research suggests that attractiveness is affected by eye color. B) Research suggests that the lighting in theaters affects our visual perception. C) Research suggests that most people find enlarged pupils more attractive. D) Research suggests that perceived attractiveness increases as the pupil becomes smaller.