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  4. The entry of pollen tube into the ovule through micropyle is called

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Q. The entry of pollen tube into the ovule through micropyle is called

J & K CETJ & K CET 2008

Solution:

After reaching ovary, the pollen tube enters in the ovule. For this purpose, pollen tube can follow one of the following three routes Porogamy-Pollen tube enters in the ovule through micropyle. It occurs in mostly angiosperms. Mesogamy-Pollen tube enters through integuments (Cucurbita) or through funiculus (Pistacia). Chalazogamy-Pollen tube enters through chalazal tissues, eg, Casuarina, Beta vulgaris, Pterocarya, Ostrya, Jaglans regia.