Question
Biology Question on sexual reproduction in flowering plants
In angiosperm all the four microspores of tetrad are covered by a layer which is formed by :-
A
Pectocellulose
B
Callose
C
Cellulose
D
Sporopollenin.
Answer
Callose
Explanation
Solution
Callose wall surrounds the sporocytes during the meiotic stage. It provides an isolation barrier sealing off one meiotic cell (megaspore mother cell) from another. Hence it acts as a molecular filter isolating the developing microspores from the influence of the surrounding diploid tissue or sister spores.