Question

Constituents of intine and exine respectively
(A) Sporopollenin and pectocellulose
(B) lignin and pectin
(C) pectocellulose and sporopollenin
(D) chitin and cellulose​

Answer 1

Answer:

(A) Sporopollenin and pectocellulose

Explanation:

While the exine is composed of sporopollenin, a complex and highly resistant biopolymer containing fatty acids, phenylpropanoids, phenolics and carotenoids, the intine is largely composed of pectin and cellulose. The origin and genetic control of the synthesis of the two pollen wall layers is different.

Answer 2

Answer will be (c) pectocellulose and sporopollenin.

Intine or inner layer is made up of pectocellulose (pectin and cellulose).

Exine or outer layer is made up of sporopollenin which is the most resistant organic substance known it is resistant to biological decomposition due to which pollen grains are preserved as fossils.