A genetic change that occurs in a body cell of a mouse will not contribute to the evolution of the species because

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Explanation:

a genetic change that occurs in a body cell of a mouse will not contribute to the evolution of the species because genetic changes that occur to the somatic cells of organisms are are not passed to the next generation.

Evolution generally involves a gradual change to organisms over a long period of time. Mutation, on the other hands, refers to changes to the genetic components of organisms.

Mutations that happen to the somatic cells of organisms are referred to as somatic mutations while those that happens at the germ-line levels of organisms are referred as germ-line mutations.

While the former are not heritable by offspring, the latter are heritable.  Attributes that cannot be passed to the offspring do not contribute to the evolution of organisms.

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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age range would be the answer