Which of the following is good for a plant?

C.

Explanation:

Although plants need carbon to make oxygen, it doesn't need carbon to grow. It needs sunlight and water to grow more than anything.

c,d

Explanation:

hehe don't be mad at me

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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i think that d. wind is the answer.   i missed the question when i answered a. currents.