Based on the 10% rule, if there are 10,000 calories of net primary productivity in an ecosystem, how much energy will be generally available to a primary consumer

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.