Question

Sporopollenin, a chemical substance is found in ............................

• A. Endothecium of anther
• B. Tapetum of anther
• C. Intine of pollen grain
• D. Exine of pollen grain

Answer 1

The correct option is D Exine of pollen grain

Sporopollenin is a major component of the tough outer walls called as exine walls of plant spores and pollen grains. It is chemically very stable and usually well preserved in soils and sediments. The chemical composition of sporopollenin is not exactly known due to its unusual chemical stability and resistance to degradation by enzymes and string chemical reagents.