Plz answer quick what is countershading? how is this an important adaptation for a frog?

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.

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