describe the structure of a 3 celled pollen grain of an angiosperm
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Structure of 3-celled pollen grain :
Structure of 3-celled pollen grain :(ii) Each pollen grain has a prominent two-layered wall. (iii) The outer layer is called exine and the inner layer is called intine. (iv) Exine is hard and made up of sporopollenin. ... (vii) A mature pollen grain has two cells - a vegetative cell and a generative cell.
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