$A$ fatty acid has a carboxyl group attached to an $R$ group. The $R$ group could be a

Which groups are present in the structures of sterol and sterone,respectively?

Why are lipids not considered as macromolecules?

How does sterone differ from sterol by the presence of which group?

Match the following columns correctly:

Column-$I$	Column-$II$
$(a)$ Fat	$(i)$ All fatty acids are saturated and long-chained
$(b)$ Oil	$(ii)$ All fatty acids are unsaturated and short or long-chained
$(c)$ Wax	$(iii)$ Alcohol molecule is monohydroxy alcohol
$(d)$ Complex lipid	$(iv)$ Lipid plus non-lipid component

In an experiment,freshly hatched larvae of an insect (Khapra beetle) were reared on a basal diet (complete diet without cholesterol) with increasing amounts of cholesterol. Results obtained are shown in the given graph.
The graph indicates: