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  4. When pollen tube enters through micropyle, the process is called

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Q. When pollen tube enters through micropyle, the process is called

BVP MedicalBVP Medical 2009

Solution:

The pollen tube may enter the ovule by following one of three routes given below : Porogamy-Pollen tube enters the ovule through micropyle, eg, most angiosperms. Mesogamy-Pollen tube enters the ovule through integuments (eg, Cucurbita) or through funiculus {eg, Pistacia). Chalazogamy-Pollen tube enters the ovule through chalazal tissues, eg, Casuarina, Beta vulgaris, Juglens regia, etc.