Reproduction is

Match the following columns and select the correct option:

Column-$I$	Column-$II$
$(a)$ Unisexual	$(1)$ Ovum
$(b)$ Bisexual	$(2)$ Syngamy
$(c)$ Fertilization	$(3)$ Monoecious
$(d)$ Female gamete	$(4)$ Dioecious

Select the correct option for the zygote.
$I -$ It is found only in organisms undergoing sexual reproduction.
$II -$ It is always diploid $(2n)$.
$III -$ It is also known as a fertilized egg.
$IV -$ It is always formed as a result of fertilization or syngamy.
$V -$ It is the link between two generations.

The period from birth to natural death is called

The given figures labelled $A$ and $B$ represent:

Arrange the following animals in ascending order of their maximum lifespan and select the correct option:
Animal Name | Code
Butterfly | $(a)$
Crocodile | $(b)$
Swan | $(c)$
Toad | $(d)$
Parrot | $(e)$