Which of the following statements accurately describes the relationship between coral reefs and aquatic organisms?
a. aquatic organisms have only a predatory relationship with coral reefs.
b. coral reefs provide aquatic organisms with resources but derive no benefits in return.
c. coral reefs provide resources for aquatic organisms and derive resources from other organisms as well.
d. aquatic organisms live independently of coral reefs.

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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c

explanation: