Which sequence of events BEST describes secondary succession?

A: lichens- shrubs- small trees- forest

B: grass- shrubs- small trees- forest

C: lichens- small trees- shrubs- forest

D: grass- small trees- oak trees- shrubs

Option C.

Explanation:

Secondary succession occur after primary succession and it occur when an area that has supported vegetation previously before ecological disturbances like fire, tornadoes, floods or hurricanes destroyed plants and animals there.

Primary succession occur over time and there is increase in organic matter of the soil.

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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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