How many gametes are produced in the pollen grain of a flowering plant before fertilization?
Two gametes are produced in the pollen grain of a flowering plant before fertilization. The pollen grain contains the male reproductive cells of the plant, which are called gametes. These gametes are produced through a process called meiosis, in which a single cell divides into two cells, each with half the number of chromosomes as the original cell. In flowering plants, each pollen grain produces two gametes, which are then released into the air and carried to the female reproductive structures, where fertilization can occur. This process is essential for the reproduction and continuation of the species.