This can occur when part of a population of a species becomes separated from the remainder, they may over time evolve different characteristics from the parent population

answer; polycythemia is the correct answer;

the answer is c on e2020, bud.

sex cells are usually half's then they find another half and make a fertilize egg

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.