What is the function of the valves in veins in the legs?
O
A More blood moves through veins
O
O
O
B They prevent blood from moving up toward the head.
C More blood moves through arteries
R They prevent blood from moving down toward the feet

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.