The responsible for producing energy for cellular functions by producing atp from glucose and contain their own dna.

mitochondria is the answer you are looking for

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explanation:

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.