4. Describe the political actions that led to successful conservation in both text Community Conservation Only 100 points will give Brainliest

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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i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

answer; i believe the answer is (polygenic inheritance;

carbon atoms, hydrogen, oxygen, and nitrogen.