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  4. Pollen tube enters into ovule through micropyle is called :

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Q. Pollen tube enters into ovule through micropyle is called :

Bihar CECEBihar CECE 2004

Solution:

After arriving at the top of ovary the pollen tube may enter the ovule by following three ways: [a] By micropyle: The entry of pollen tube into ovule through micropyle is called porogamy. [b] By chalaza: The entry of pollen tube in the ovule through chalaza is called chalazogamy. [c] By integument: The entry of pollen in the ovule through integument is called mesogamy.