When dealing with chemicals in the laboratory, which of the following is not safe?

checking labels on any chemical containers

washing your hands after working with chemicals

directly smelling any chemicals

avoiding skin contact with chemicals

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.