Which describes a population depending on an abiotic factor?

Hello!

I'm assuming the options are:

A) A bean plant does not grow well because it is planted where there are many weedy plants.

B) Coral reef organisms carry out photosynthesis using the sunlight that passes through the clear water above.

C) Squirrels eat eggs from a bird's nest.

D) A hawk preys on a mouse.

The answer is B) Coral reef organisms carry out photosynthesis using the sunlight that passes through the clear water above.

Explanation:

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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the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.