What is the difference between mitosis and meiosis? a. meiosis happens more quickly than mitosis. b. meiosis includes one cycle, and mitosis includes two cycles. c. meiosis is required for the survival of an organism and mitosis is not. d. meiosis produces four different cells, and mitosis produces two identical cells.

The answer to your question is D. Meiosis occurs when the body produces sperm or egg cells. The cell first dupicates its DNA, and then splits into four seperate cells, each with half the normal number of chromosomes, so when the egg is fetilized it ends up with a full set, half from the sperm and half from the egg.

A is wrong because meiosis actually takes longer, because the cells have to split more times than in mitosis.

B is wrong and its actually the opposite of whats stated. Mitosis has one cycle while meiosis has 2.

C is wrong because mitosis is vital to an organism's survival. Mitosis is how body cells repoduce and it replaces all your dead cells and allows you to grow. An organism can survive without meiosis, but wouldnt be able to reproduce.

Na+ loss through sweet plus the dilution has lowered na+ concentration outside of neurons, altering the na+ equilibrium potential. sodium exists more outside the cells than inside. when na+ is lost by sweat plus the dilution( because they drink a lot of water) changes the concentration outside the cell, forcing the water to enter the cell and attempt to balance the concentration inside/outside.the problem is that the abundance of water will cause the cells to swell. most cells can adapt, however, the brain cells can't that's why the runner has confusion and can't control the muscles.  if not treated and this occurs in less than 48 hours, it can be immediately fatal .