What are some of the processes involved in the flow of matter and energy among Earth's geosphere, hydrosphere, atmosphere, and
biosphere?

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).

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.

answer: b

coz red blood cells marrow and circulates the body for 120 days.

answer; behavioral neuroscience;