Being the same species means that they can reproduce and create fertile, healthy offspring. If they are in the same species they are surely in the same family too.
Rabbits produce large numbers of offspring during each reproductive season, yet the number of rabbits within a given population changes very little from year to year. The stability of the population size is most likely the result of environmental factors that keep the population in check (2). Rabbits are seen as food by many predators which will keep the numbers down. The principle of the survival of the fittest will ensure that young strong rabbits get to breed and carry the gene pool to the next generation.
Answer: Homeostasis is the cell membrane is a responsible for maintaining a stable internal environment