Question

A pollen grain is provided resistance from physical and biological decomposition by its ______ 

विकल्प

• Exine composed of cellulose and pectin

• Exine composed of sporopollenin

• lntine made up of cellulose and pectin

• Intine made up of sporopollenin

Answer 1

A pollen grain is provided resistance from physical and biological decomposition by its Intine made up of sporopollenin.

Explanation:

Foliar bud produced on the surface of a leaf of Begonia for vegetative propagation. In Bryophyllum and Kalanchoe, the buds are produced on the margin of the leaf.