Question

Write in detail, the structure of pollen grain

Answer 1

• Pollen grains in angiosperms are unicellular, uninucleate, haploid, non-motile normally round structure. 
• The nucleus and dense cytoplasm are covered by a two-layered wall. 
• The outer layer is thick, stiff and protective and is called exine. 
• The inner layer is thin and elastic and is made up of cellulose and pectin.
• There are a few thin areas in the exine called germ pores.