The vital link that ensures continuity of species between organisms of one generation and the next is represented by all of the following,except:

Match the following columns:

Column-$I$	Column-$II$
$(a)$ Sporopollenin	$(1)$ Spindle-shaped nucleus
$(b)$ Cellulose,Pectin	$(2)$ Exine
$(c)$ Vegetative cell	$(3)$ Intine
$(d)$ Generative cell	$(4)$ Irregularly shaped nucleus

Even in the absence of pollinating agents,seed setting is assured in

Give differences: Male gametophytic stage and Female gametophytic stage.

Even in the absence of pollinators,seed-setting is assured in $-$

Given below are two statements: One is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A)$: Both wind and water pollinated flowers are not very colourful and do not produce nectar.
Reason $(R)$: The flowers produce an enormous amount of pollen grains in wind and water pollinated flowers.
In the light of the above statements,choose the correct answer from the options given below: