Which pair of structures best shows that plant cells functions different from animal cells? A. chloroplast and cell walls
B. Cytoplasm and mitochondria
C. ribosomes and cell membranes
D. Nuclei and centrioles

A.chloroplast and cell walls

Explanation:

hope this helps

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.  

read more on -

blah

explanation:

bc blah