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Q 2644578453.     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?
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)