CFTR, an ABC protein, is a Cl− channel, not a pump. Channel opening is triggered: 

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#Question id: 3436

#Unit 11. Evolution and Behavior

Loss of responsiveness to stimuli that convey little or no new information is called

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#Question id: 13176

#Unit 10. Ecological Principles

Coral reefs can be found on the southern east coast of the United States but not at similar latitudes on the southern west coast. Differences in which of the following most likely account for this?

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#Question id: 19701

#Unit 13. Methods in Biology

Choose correct statement about Electrocardiogram Augmented Limb Leads.

a. In this type of limb lead system, two of the limbs are connected through the positive terminal of the electrocardiograph, and the third limb is connected to the negative terminal. 

b. In this type of limb lead system, two of the limbs are connected through the negative terminal of the electrocardiograph, and the third limb is connected to the positive terminal. 

c. When the positive terminal is on the right arm, the lead is known as the aVR lead; when on the left arm, it is known as the aVL lead; and when on the left leg, it is known as the aVF lead.

d. When the negative terminal is on the right arm, the lead is known as the aVR lead; when on the left arm, it is known as the aVL lead; and when on the left leg, it is known as the aVF lead.

Which of the following combination is correct?

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#Question id: 63

#Unit 1. Molecules and their Interaction Relevant to Biology

The two molecules shown in the figures are best described as ________.

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#Question id: 9192

#Unit 9. Diversity of Life Forms

The oak tree pathogen Phytophthora ramorum has migrated 650 km in ten years. West Nile virus spread from New York State to 46 others states in five years. The difference in the rate of spread is probably related to