A desert fox evolves large ears, whereas a snow fox develops short ears. These divergent features demonstrate that
A. fitness varies across environments.
B. adaptations are random.
C. migration influences evolutionary history.
D. mutations with no reproductive advantage occur at random.
Answer: A
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The amount and accuracy of information that children spontaneously recall about past events decreases substantially after about two years time. Why is this research finding important?
a. It proves that children do not have good recall memory. b. It shows that parents should remind their children of past events more frequently, particularly when it involves fun memories that the children would like to have later on in life. c. It suggests that children may not make very good eye witnesses, particularly when there are extended periods of time between the criminal event and the trial. d. It implies that infantile amnesia is a natural part of developing recall memory.
During amniocentesis,:
a. a biopsy is taken from the pregnant mother's spine. b. fluid is tested from the "sac" containing the fetus. c. the father's sperm is tested for genetic abnormalities. d. the mother's eggs are tested for genetic abnormalities.
Women often deal with stressful situations by coming together in groups, such as establishing a childcare coop for women to poor to afford daycare. Which best describes this behavior?
A. fight B. flight C. freeze D. tend and befriend
Brenda and Todd are each 20-years-old; Brenda is a lesbian and Todd is gay. Research on the stability of sexual orientation suggests which of the following about their sexual orientation over time?
A. Both will continue to only identify as homosexual throughout their lives. B. Todd is less likely to experience fluctuations in his sexual orientation. C. Brenda is less likely to experience fluctuations in her sexual orientation. D. They are equally likely to experience fluctuations in their orientation over time.