(a) Name the organic material exine of the pollen grain is made up of. How is this material advantag
Channel: Doubtnut
Date: 03/01/2020

(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 ?