Match the following:

Column-$I$	Column-$II$
$(1)$ Germ pore	$(a)$ Lack of sporopollenin
$(2)$ Parthenium	$(b)$ Malva
$(3)$ Self incompatibility	$(c)$ Palms
	$(d)$ Contaminant with imported wheat

Pollen grains of many species cause severe allergies and bronchial afflictions in some people,often leading to chronic respiratory disorders such as .....

In multicellular organisms, life begins with a .......... .

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

Choose the correct option with respect to the type of division during gamete formation and the type of division in the zygote for organisms having a haplontic life cycle,respectively.

Assertion $(S)$: Death is a meaningful event.
Reason $(R)$: Death keeps the number of organisms of each species limited.
$(A)$ Both $S$ and $R$ are true,$R$ is the correct explanation of $S$.
$(B)$ Both $S$ and $R$ are true,but $R$ is not the correct explanation of $S$.
$(C)$ $S$ is true and $R$ is false.
$(D)$ $S$ is false and $R$ is true.