Mitosis is responsible for growth, repair, and maintenance in an organism because

Mitosis is responsible for the growth and repair of the organism. The mitosis in the unicellular organism such as bacteria, mitosis is a type of asexual reproduction which makes identical copy of the organism.

In case of the multi cellular organism, mitosis is used to repair the damaged cells of the body. It helps in the recovery of the body by the process of cell cycle regulation. The cell undergoes various phases and new cells are formed  by the preexisting cells and damaged cells are repaired.

Hence, mitosis in the body of the organism helps in keeping the body healthy.

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.