The most resistant organic material known which makes up the outermost layer of pollen wall is
Pectin
Cellulose
Sporopollenin
Lignin
Sporopollenin $\rightarrow$ Caratenoid derivative
First three layers of microsporangium which does the function of protection are
Tapetum is a part of
In an young anther the four rows of cells which later produce pollen are called
Describe internal structure of microsporangium.
Assertion : Pollen mother cells $(PMCs)$ are the first male gametophytic cells. Reason : Each $PMC$ gives rise to two pollens.
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