Which of the following tends to decrease potassium secretion by the cortical collecting tubule?

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#Question id: 1489

#Unit 4. Cell Communication and Cell Signaling

How might you distinguish between a malignant tumor and a benign tumor?

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#Question id: 653

#Unit 1. Molecules and their Interaction Relevant to Biology

For the enzyme-catalyzed reaction S ~ P, Keq = 5, which of the following curves best represents the change in [S] that occurs with time when S is added to a solution containing the appropriate enzyme?

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#Question id: 24246

#Unit 4. Cell Communication and Cell Signaling

Fibronectin binds to integrin through: 

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#Question id: 3491

#Unit 11. Evolution and Behavior

Some dogs love attention, and learns that if he barks, he gets attention. Which of the following might you use to describe this behavior?

A) The dog is displaying an instinctive fixed action pattern.

B) The dog is trying to protect its territory.

C) The dog has been classically conditioned.

D) The dog's behavior is a result of operant conditioning

E) The dog is displaying controlled by external stimuli

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#Question id: 12537

#Unit 10. Ecological Principles

In terms of nutrient cycling, why does timber harvesting in a temperate forest cause less ecological devastation than timber harvesting in tropical rain forests?