Refer to the graph above. At the same time that the stimulus was introduced, a drug that specifically inhibits sodium channels was added to the system. The effect this would have is that the membrane would
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A) not depolarize.
B) depolarize for the first impulse but not for a second one.
C) not be able to repolarize.
D) repolarize, but would not for a second impulse.
E) none of the above
A) not depolarize.
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Oxygen did not accumulate in the early atmosphere until it reacted with reduced materials, especially ________, in the oceans
A) hydrogen B) elemental sulfur C) ferrous iron D) nitrate
Which type of cell division occurs during growth and repair of tissues?
Which of the following is NOT a cnidarian?
A. a comb jelly B. a jellyfish C. a hydra D. a sea anemone E. a coral
Use the figure shown, and what you learned from the text, to choose the true statements about the evolution of flower development. Arabidopsis, tomato, and apple are the eudicots. (choose all that apply)
_____ PI evolved before the most recent common ancestor of all flowering plants.
_____ The eudicots do not have stamens.
_____ PaleoAP3 controls petal development in the eudicots.
_____ With the duplication of paleoAP3, AP3 gained a role in stamen development.
_____ AP3 with a role in petal development is a shared derived character of eudicots.
Clarify Question
· What is the key concept addressed by the question?
· What type of thinking is required?
· What key words does the question contain and what do they mean?
Gather Content
· What do you already know about the evolution of flower development genes?
Consider Possibilities
· Consider the different answer options. Which can you rule out?
Choose Answer
· Given what you now know, what information and/or problem solving approach 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?