Germpore is the region where the exine is
Thick
Uniform
Thick and uniform
Absent
Pollens outer layer is called ...$A$... This is made up of ...$B$.... This is absent on the ...$C$.... Fill in the blanks $A, B$ and $C$
The pollen viability period of rice and pea respectively, is
The cell that divides to form two male nuclei in angiosperms is
Which one of the following is resistant to enzyme action?
Exine of pollen grains is composed of