The angiosperms have developed specialized structures for the reception of pollen grain followed by species-specific reactions which activate the pollen grain. The pressure build-up helps to break exine and intine part develops into a pollen tube which moves two male gametes for the double fertilization.

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Chapter 32, Problem 5TY

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Introduction: The angiosperms have developed specialized structures for the reception of pollen grain followed by species-specific reactions which activate the pollen grain. The pressure build-up helps to break exine and intine part develops into a pollen tube which moves two male gametes for the double fertilization.

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