Question

In angiosperms all the four microspores of tetrad are covered by a layer which is formed by

Answer 1

pectucellulose

hope this answer will help you........

Answer 2

In angiosperms all four microspores of tetrad are protected by a layer formed by “polysaccharide called as callose”.

Explanation:

Callose is a polysaccharide which is produced in the plants due to synthesis of glucan synthase like gene. The major compound of this polysaccharide is glucose which is linked together by the β-1,3 linkages. It is the compound which forms a layer like structure during reproduction process and protects the four microspores of tetrad by covering it.