What are villi, and in what organ system do they function?

what's the question?

1. dermis

2. chemical

3. urine

4. viruses

5. antibodies

i think it is dna, i'm not totally sure but i think it might be.

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.