Multiple choice

Exine of pollen-grain is made up of

  1. Cellulose

  2. Sporopollenin

  3. Callose

  4. Pectin

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sporopollenin is a major component of the tough outer (exine) walls of spores and pollen grains. It is chemically very stable and is usually well preserved in soils and sediments.