Researchers describe a species that developed color vision, an adaptation that rapidly spread through the population. The rapid spread of the adaptation is evidence that
A. color vision translated to large survival advantages.
B. a gene-environment interaction was operating.
C. color vision was artificially selected for.
D. color vision was the result of genetic drift.
Answer: A
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Professor Brewer says, "Schizophrenia spectrum disorders is a group of disabling disorders that frequently require hospitalization at enormous financial and psychological cost to patients, their families, and their friends. The lifetime prevalence in the United States is about five percent. It significantly affects more males than females. Because its causes are clearly understood, effective
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Currently, the Canadian government recommends that _____ minutes of moderately vigorous exercise each week will reduce the risk of chronic illness.
A) 120 B) 150 C) 180 D) 210
What happens in the third stage of childbirth?
A. The placenta is expelled by uterine contractions. B. Contractions push the baby from the mother's body. C. Uterine contractions are spaced at ten to fifteen-minute intervals. D. The fetus's head is positioned toward the opening of the cervix.
Efferent spinal nerves arise from the _________ root of the spinal cord and carry ___________ information.
A. ventral; sensory B. ventral; motor C. dorsal; sensory D. dorsal; motor