The sense of smell
A. can respond to very low concentrations of molecules.
B. requires a long time before odors can be perceived.
C. responds to four basic shapes of molecules.
D. fatigues very slowly.
A. can respond to very low concentrations of molecules.
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Thanks to a novel recessive mutation, a certain plant species has begun to invade colder Arctic regions outside of its normal range. However, this cold-tolerant mutation has not yet become fixed in the population. A second mutation arises that promotes self-pollination. Do you predict that the self-pollination allele will be selected for in the Arctic regions? Why or why not?
A. Yes. The self-pollinated plant is more likely to maintain the cold-tolerant mutation, and plants in the Arctic are unlikely to be visited by pollinators. B. No. Outcrossing is always beneficial, since it enhances genetic diversity. C. No. Plants that produce flowers must be cross-pollinated for proper seed development. D. Cannot make a prediction from the information given. It depends on whether the plant is normally insect-pollinated or wind-pollinated. 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 pollination? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process 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?
what is secreted by monocytes that attract neutrophils to the site of lipid A?
What will be an ideal response?
The organism in the above photograph has
which of the following structural systems? a. cartilaginous b. bone c. hydrostatic d. chitinous e. endoskeletal
In humans the reproductive and renal/urinary systems share "plumbing" in
A. females B. males C. both males and females D. neither males nor females