What is the number of chromosomes in a meiocyte of a potato plant?

Assertion $(A)$: Death is a meaningful event.
Reason $(R)$: Death limits the number of individuals of each species and returns the materials of the body,formed by life elements,back to the environment.

In the figure given below,label the following parts: male gametes,egg cell,polar nuclei,synergid,and pollen tube.

Identify the incorrect statement.

In castor and maize plants, . . . . . .

Explain post-fertilization events.