How does sexual reproduction take place in flowering plants?

Sexual reproduction of flowering plants occurs in a special genital organ – a flower. In the process of meiosis, spores are formed in it, different in size and physiology: microspores are formed in the stamens, which form male gametes, and a megaspore is formed in the ovule, from which a female gamete is formed – the embryonic sac. After the formation of gametes, pollination occurs – the transfer of pollen from the stamens to the stigma of the pistil. The pollen grows into the pistil, forming a pollen tube, through which sperm enter the embryonic sac, where one sperm fuses with the egg, forming a diploid zygote, and the other with the central cell of the embryonic sac, forming a triploid cell, from which the nutritive tissue of the seed develops. The whole process takes place in the flower and is called “double fertilization”.

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