Among deer, only males have antlers. E. the marginal value theorem 29. The process is halted by natural selection on survival E. Female preferences are initially random 31. C. larger prey take longer to open D. A, B, and C E. A and C 32. E. all of the above 37.
Mayflies are insects that are aquatic as larvae and emerge as flying adults.
This would be an example of A. the selfish herd B. the dilution effect C. gene-level selection D. group selection E. learning 38. E. Eating these fruit helps the monkeys to maximize their rate of energy intake. C. Females prefer to mate with fatted males . D. Males that are fatted actually produce more sperm, resulting in sperm competition. E. Fatted males appear larger and are less likely to get involved in fights with other males.