Can nonrenewable resources be used sustainably? ( dont answer unless you are 200% sure you know the answer)
a. no, there's a finite amount of nonrenewable resources
b. yes, nonrenewable resources are always beneficial for the environment
c. yes, as long as use doesn't exceed availability
d. no, there are only negative effects of using nonrenewable resources

C. Yes, as long as use doesn't exceed availability

Explanation:

Non-renewable resources are resources that can become depleted because they cannot be easily replenished. The most common example of a non-renewable resource is fossil fuels.

In order to use non-renewable sustainably, we must understand the concept of conservation of resources. The sole aim of conservation is to use resources reasonably well so that their availability would not be limited compared to the use they are put to.

Through resource conservation, non-renewable resources can be used sustainably.

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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the correct answer is:

a population changes in response to a change in the environment.