An anther has $1200$ pollen grains. How many pollen mother cells must have been there to produce them?

Pollen kit material is secreted by

Given below are two statements.
Statement $I$: Generally,anthers in angiosperms are dithecous,having two pollen sacs in each lobe.
Statement $II$: Each sporangium produces pollens from sporogenous tissues by the process of sporogenesis.
In light of the above statements,select the correct answer from the options given below.

Choose the correct option with respect to germ pore.

In a microsporangium,which layer is generally having more than one nucleus?

Which of the following parts is not a component of the stamen?