Can someone help me with these? please... I’m failing and well my turning this in, i will pick up my grades a little. HELPPP PLEASEEE

Which system revise and send electrical signals throughout the body

Which of the following occurs most often in a population when genetic variation and overproduction are present? some organisms have a lower reproductive success than others. some organisms have a higher reproductive success than others. some organisms have no reproductive success. some organisms do not have genetic variation.

What happens during interphase? (1)the nucleus grows to its full size. (2)the cell grows to its full size. (3)the nucleus divides into two nuclei. (4)the cell divides into two cells.