Why did Mendel choose the pea plant $(Pisum \text{ } sativum)$ for his experiments?

Mendel observed a contrasting trait in relation to the position of flowers. Mention that trait.

In a beetle population, the number of green beetles is more than blue and red beetles. Give a reason behind this situation.

Give reasons for the following:
$(a)$ Traits acquired during the lifetime of an individual are not inherited.
$(b)$ All human beings belong to a single species.
$(c)$ Variations keep on accumulating during reproduction and do not disappear in the next generation.

By what is the expression of tallness in the pea plant exhibited?

Which of the following is the correct match between List-$I$ and List-$II$?

List-$I$	List-$II$
$1$. Acquired trait	$a$. Wings of a bird and wings of a butterfly
$2$. Evidence of evolution	$b$. Wings of a bird and forelimb of a lizard
$3$. Homologous organs	$c$. Docked tail of a mouse
$4$. Analogous organs	$d$. Fossils