Which of the following statements would apply to both the fast block to polyspermy and nerve
conductance?
a. The plasma membrane is depolarized.
b. Calcium ions accumulate in the cytoplasm.
c. The sodium-potassium pump maintains the transmembrane potential.
d. A signal transduction pathway opens ion channels.
e. The cytoplasm is positively charged relative to the extracellular space.
A
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Halophytes are plants that live in saline soils. The high osmotic potential of the salt solution in the soil creates a very negative water potential. What can halophytes do so that water will flow into the roots?
A. They can close their stomata so that less water is lost through transpiration. B. They can open all their stomata so that transpiration "pulls" more water into the roots. C. They can increase the solute concentration in their roots creating a water potential that is more negative than the soil. D. They can pump ions out of the plant creating a water potential in the roots that is more positive than the soil. E. They can remove the mycorrhizal fungi from their roots decreasing the competition for water. 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 adaptations that occurs in plants that live in salty environments? How does it relate to the question? Consider Possibilities What other information is related to the question? Which information is most useful? 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?
Based on the following phylogenetic tree, is the sun bear more closely related to the sloth bear or to the brown bear? Explain your reasoning.
What will be an ideal response?
How many weeks does prenatal development
last in humans?
a. 31 b. 38 c. 40 d. 45 e. 52
After a week of asymptomatic infection with Bordetella pertussis, the patient has cold-like (catarrhal) symptoms for a week or two followed by a period of severe paroxysmal episodes of coughing that leave the patient anoxic and fatigued
Indicate whether the statement is true or false