Question

Pollen grain has a prominent two layered wall. The inner wall

• A. Is made up of cellulose and pectin
  
• B. Is thin and continuous
  
• C. Both A and B
  
• D. Is made up of sporopollenin
  

Answer 1

The correct option is C Both A and B


Pollen grain
The pollen grains are haploid cells that represent the male gametophyte because the male gametes are formed from them.

Wall of pollen grain
Wall of pollen grains is made up of two layers :
Exine
Intine

Exine
Exine is the outer layer, composed of sporopollenin which makes it resistant to enzymes, acids and high temperature.

Intine
Intine is the thin and uniform inner layer, which is composed of pectin and cellulose. It can be easily degraded by enzymes, acids and high temperature.

Final answer
(d) Both A and B