Humans can express blood types A, B, AB, or O. In order for a person to express blood type O, they must inherit the allele for O type blood from both parents. A person would express AB type blood if they inherited the A allele from one parent and the B allele from the other parent. Therefore, blood type in humans demonstrates a
complete dominance
b
codominance
c
incomplete dominance
d
complete dominance and codominance
e
incomplete dominance and codominance

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's the cell cycle, but cytokines is when the cell divides.

theres 3 stages interphase,mitosis,and cytokines.

interphase prepares the cell for division.

mitosis is the process of dividing the cell,it has 4 parts interphase,anaphase,metaphase,and telophase.

lastly there's cytokines,that's when the cell divides into 2 daughter cells

"a.) well–developed vascular system."