Which term describes the tertiary structural organization of chromosomal dna that allows the long strand to be packed and fit into the cytoplasm of the cell?

The correct answer will be- supercoiling.

Explanation:

Supercoiling is the additional twisting of the chromosomal DNA in the cell which could be either in the opposite direction of the turn or in the same direction.

Supercoiling occurs by twisting the DNA around itself which help the packaging of the large genetic material to fit into the nucleus or the cytoplasm of the cell. The supercoiling reduces the space for the DNA Packaging and allows more DNA to be packaged.

Thus, supercoiling is the correct answer.

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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brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation: