Which of the following is NOT an adaptation of tundra plants? *

A. Plants circulate sap through their stems and leaves for nourishment and to prevent freezing.

B. Plants grow in bunches to crate insulation and protection from the wind.

C. Plants grow tall and with wide leaves to absorb the maximum amount of sunlight.

D. None of the above.

C

Explanation:

Tundra plants are low-lying so that when snow falls it will blanket the plant and help insulate it.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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