Why is active transport the opposite of passive transport (osmosis and diffusion).

Active transport requires the use of energy to move particles across a cell membrane, and Passive transport does not use any energy to move particles across the cell membrane.  Hope this helped!

-TTL

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.