Which is part of the theory of evolution by natural selection?
o
a. it is impossible to pass along traits from one generation to the
next.
o
b. the best-adapted animals in a population cannot reproduce.
c. new generations are better suited to survive than previous
generations.
o
d. evolution can only cause small changes to a species.

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.  

read more on -

b 04545