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

Question

In angiosperms, all the four microspores of tetrad are covered by a layer which is formed by (A) pectocellulose (B) callose (C) cellulose (D) sporopollenin

Tardigrade Admin · Accepted Answer

The deposition of callose starts in pollen mother cell as it enters meiosis and is complete by the end of first meiotic division. By the time tetrad are formed, the common callose wall dissolves even then all the four micro-spores lie within a common callose wall.

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

pectocellulose

callose

cellulose

sporopollenin

The deposition of callose starts in pollen mother cell as it enters meiosis and is complete by the end of first meiotic division. By the time tetrad are formed, the common callose wall dissolves even then all the four micro-spores lie within a common callose wall.