Describe the consequence of the degeneracy of the genetic code to the likely effect of a change to one base in a triplet:

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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amber has allowed scientists to study dna that has been preserved over millions of years.

d. groundwater flows through the subsoil and deposits minerals.