Minicells result from mutations that
a. prevent DNA replication.
b. prevent septum formation.
c. prevent growth of the cell.
d. prevent chromosome partitioning.
e. cause septa to be formed in the wrong place or to be formed too frequently.
Ans: e
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Which category in the figure above makes available the highest productivity per square meter?
A) tropical wet forest B) open ocean C) algal beds and reefs D) wetlands
Which type of selection will favor the intermediate form of a trait?
a. Sexual selection b. Stabilizing selection c. Mutations d. Disruptive selection e. Directional selection
When pollen from one species lands on the stigma of a flower from another species
a. the pollen tube typically does not develop. b. the pollen tube typically forms, but the sperm cannot penetrate the egg. c. the pollen tube typically forms and grows to the ovary, but then stops. d. the pollen tube typically forms, but the sperm are killed. e. the pollen tube typically forms and the egg is usually fertilized, but the embryo rarely grows.
Male hummingbirds flash a patch of iridescent feathers on their neck called the gorget. This behavior makes them very visible. Why advertise their presence to a predator?
A. Hummingbirds are so fast that predation is not a large factor for them. B. Predators cannot see colors so are not alerted. C. The benefits of defending a territory exceed the costs of predation. D. This is an example of a maladaptive behavior that decreases overall fitness. Clarify question: What is the key concept addressed by the question? What type of thinking is required? Gather Content: What do you already know about the tradeoff of being visible to potential mates and predators? What other information is related to the question? Answer: Given what you now know, what information is most likely to produce the correct answer? Reflection: Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?