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Darw a labelled diagram of germination of pollen on stigma following parts and write one function of each 1 pollen tube 2ovary 3 pollen grain |
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Answer» the pollen tube is siphonogamous and its main FUNCTION is to carry the male gametes for double fertilization. In some TAXA, as in Cucurbitaceae, the tube branches after entering the ovule, prior to fertilization. The tube may even swell and form a bulla.The ovaries produce the egg cells, called the ova or oocytes. The oocytes are then transported to the fallopian tube where fertilization by a sperm may occur. The fertilized egg then moves to the uterus, where the uterine lining has thickened in response to the normal HORMONES of the reproductive cycle.Pollen grains carry male reproductive cells (gametes) in a plant and are haploid microgametophytes. Their main function is in the transferring of the male gametes to their female counterparts (OVULES – female reproductive cells) in the EMBRYO sac. It thereby facilitates sexual reproduction to occur in the plant. |
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