Question
Biology Question on sexual reproduction in flowering plants
Callase enzyme which dissolves callose of pollen tetrads to separate four pollens is provided by
A
pollens
B
tapetum
C
middle layers
D
endothecium
Answer
tapetum
Explanation
Solution
Tapetum secretes Ubisch bodies which get covered with sporopollenin and so increase thickness of exine of pollen grain wall. Tapetum provides nourishment to developing microspores. It also secretes callase enzyme which dissolves callose substances by which four pollens of a pollen tetrad are united, hence separating microspores or pollens of a tetrad.