When Charles Darwin set sail on the HMS Beagle, what did he and most of his contemporary scientists think about the origin of species

When Charles Darwin set sail on the HMS Beagle, most scientists, including Darwin, thought each species was specially created by God in its present form and did not change over time.

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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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