Part of the east coast of South America and the west coast of Africa have matching fossils within the same series or rock layers. This provides evidence that these continents were once * A) Separated by a much larger ocean
B) Joined together as one landmass
C) located near the North Pole
D) In a different hemisphere

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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