Hibernation is

a.

an example of an abiotic cycle

b.

triggered by changes in the weather

c.

caused only by biotic factors

d.

triggered by breeding patterns

The correct answer would be b.  triggered by changes in the weather.

Hibernation is a state of inactivity and lower metabolism generally observed in endotherms.

This state is characterized by slow breathing, slow heart rate, low body temperature, and low metabolic rate.

It helps most of the endotherms to survive through the cold seasons.

For example, beer hibernate in winters.

Thus, weather change can trigger hibernation.

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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a adaptation is when organism changes itself to fit the environment

ex. when its cold outside i wear a jacket

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