Secondary succession occurs more quickly than primary succession mainly because .

a. disturbances in the community exposes more soil
b. rocky areas contain more minerals
c. nitrogen-fixing bacteria are present
d. sunlight is more available
e. improved soil is present from the start

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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it’s lava came from an explosive eruption

ur answer is e & d

explanation: