Question

The inner most layer of pollen grain

Answer 1

Intine is the innermost layer of pollen grain which is formed of cellulose.

Answer 2

The pollen grains develop a thick wall of at least two layers, the intine and the exine. The intine, or inner layer, consists primarily of cellulose and pectins. The exine, or outer layer, is composed of a highly decay-resistant chemical called sporopollenin.