When the chromosomes line up at the equatorial plane, you can conclude the cell is in
A. anaphase.
B. metaphase.
C. interphase.
D. telophase.
E. prophase.
Answer: B
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Why do we perceive chili peppers as "hot" and peppermint as "cold"?
TRP channels normally act as temperature sensors in the body -- they are stimulus-gated ion channels, each specialized to open at various temperature thresholds. However, different TRP channels can also be gated by certain molecules such as capsaicin or menthol. A. It is a cultural convention to speak of chili peppers as hot and peppermint as cold. B. Capsaicin and menthol act as agonists of TRP channels normally activated by temperature changes. C. We are conditioned to think so because chili-containing foods are served hot, while mint-containing foods are served cold. D. Neurons sensitive to heat or capsaicin project to nearby regions of the brain, while neurons sensitive to cold or menthol project to other adjacent regions. E. Capsaicin transmits infrared energy, while menthol absorbs it. 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 TRP channels? 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?
Define and give examples of several homologous structures
What will be an ideal response?
The circulatory system of cephalopods is closed, whereas that of all other mollusks is open. Explain
the difference between open and closed circulatory systems, and describe how each system is adequate for the groups possessing it. What will be an ideal response?
There are 22 species of snakes in Canada and 126 species in the United States. Approximately how many do you think there are in Mexico?
A) 0 B) 3 C) 30 D) 300