Blood in systemic capillaries is bright red because . A) red cells lack oxyhemoglobin B) red cells contain oxyhemoglobin C) red cells contain carbon dioxide D) oxyhemoglobin in plasma is redde

B.Red cells contain oxyhemoglobin is the answer.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).