sequence the events sentence the items determine the correct order for these events a. human analyze formations to determine age of a rock b. particles settling out and form layers c. erosions of rocks d. fossils from living things are trapped in layers e. sediments are distributed by river to new location

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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oxygen +1 most likely

the answer is c because it is most logical.