Evolutionary biologists often start with an observation about some characteristic and then try to account for it in evolutionary terms. How might they explain the difference in the plumage of male peacocks when compared to the females?
What will be an ideal response?
A good answer will include the following key points:
• During the history of the species, males who could put on the flashiest display got the attention of females.
• Such males therefore had a better chance of reproducing and passing on the genes for their plumage.
• Females, on the other hand, did not have to attract the males' attention so they didn't need colorful plumage.
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The Premarital Relationship Enhancement Program (PREP) involves couples meeting in small groups to discuss marital relations and to learn communication skills. What has research revealed concerning the effectiveness of this program?
a. Couples that go through this program report higher marital satisfaction after three years than do couples in the control group. b. Couples that go through this program report less marital satisfaction three years later than do couples in the control group. c. Couples that go through this program report more satisfaction, but they also report more conflict than do the couples in the control group. d. Couples that were randomly assigned to this program reported less marital satisfaction after three years than did couples who made the decision on their own to participate.
Even with pressure from the global community to discontinue female circumcision in adolescence, it remains common in Africa with rates of over ____ in many countries and above ____ in Mali, Egypt, Somalia, and Djibouti
70%; 90% 60%; 80% 50%; 70% 40%; 60%