A male that mates for longer than the optimal time may miss an opportunity to mate with another female.
a. true
b. false
Answer: a. true
The cost of mating too long is that the male cannot mate with a second female while he is still mating with the first.
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Emergent properties are ____
a. characteristics of atoms but not molecules b. characteristics that depend on the level of organization of matter but do not exist at lower levels of organization c. characteristics of nonliving matter that depend on the level of organization d. dependent on higher levels of organization of living and nonliving matter e. characteristics of all multicellular organisms but not unicellular organisms
In flowering plants, how many egg cells are typically produced from each megaspore mother cell?
a. one b. two c. three d. four e. eight
Plants adapted to low-nutrient environments are characterized by
A) a high growth rate. B) decreased root production. C) increased leaf longevity. D) faster growth when more nitrogen is available.
Refer to Figure 22-2. The common hominid ancestor would be found at the position labeled:a
13
b. 12
c. 11
d. 10
e. 9