Question
Biology Question on Pre-Fertilisation: Structures And Events
Sporopollenin, a chemical substance is found in________
A
Exine of pollen grain
B
Intine of pollen grain
C
Tapetum of anther
D
Endothecium of anther
Answer
Exine of pollen grain
Explanation
Solution
The wall of pollen grain is made up of two layers, the outer exine and inner intine. Intine is pecto-cellulosic in nature and contains enzymatic proteins. Exine is made of a highly resistant fatty substance called sporopollenin and enzymes and proteins for compatibility reactions.