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After pollination the functional megaspore enlarges in size and undergoes division to form the multicellular female gametophyte. At the micropylar end 2-8 archegonia are developed which has the neck and the venter; the venter encloses the egg and a venter canal cell. The neck encloses the neck canal cell. After pollination the pollen germinates and pollen tube extends to reach the neck of the archegonium. Then it extends more into the venter of the archegonium. The sperms are produced inside the pollen tube and are discharged to the egg cell.  Then the sperm fuses with the egg to form the diploid zygote