If a round,green seeded pea plant $(RRyy)$ is crossed with a wrinkled,yellow seeded pea plant $(rrYY)$,the seeds produced in the $F_1$ generation are

The maleness of a child is determined by

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

$(a)$ What is geographical isolation?
$(b)$ Illustrate the formation of a species with the help of an example where individuals become very different from each other and are no longer capable of reproduction among themselves.

Which of the following organs,when found to be present in two animals,indicate that these two animals have been evolved from a common ancestor?

$(a)$ State any two factors that could lead to the rise of a new species.
$(b)$ How do analogous organs provide evidence in favour of evolution?