Which feature do prokaryotic and eukaryotic cells share?

They have multiple features in common. They share basic cell features such as cell membranes and molecules, such as proteins, lipids, and even carbohydrates.

All cells have a plasma membrane, ribosomes, cytoplasm, and DNA. Prokaryotic cells lack a nucleus and membrane-bound structures. Eukaryotic cells have a nucleus and membrane-bound structures called organelles.

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 enhances antibody production by t cells of the adaptive immune system.

hope i'm right

explanation: