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Question - Pre-fertilisation - Structures and Events - Stamen, Microsporangium and Pollen Grain

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Question

(a) Name the organic material exine of the pollen grain is made up of. How is this material advantageous to pollen grain?

(b) Still it is observed that it does not form a continuous layer around the pollen grain. Give reason.

(c) How are ‘pollen banks’ useful?

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