Why are fossil fuels considered nonrenewable resources if they are still forming? Select one:

a.
Today’s fossil fuels cannot be used in the same way that older fuels can

b.
We are using up the fossil fuels at a much faster rate than they can naturally form

c.
Newer fossil fuels are inaccessible to humans

d.
Fossil fuels are not still forming. Those processes stopped long ago.

a

Explanation:

Fossil fuels are considered non renewable because they take millions of years to form but depleted faster than they are formed.

a, i am pretty sure.

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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