By this time, you all know that babies
 
They look similar to their parents, for
 
example in humans we all look similar to
 
our parents. Right? But does it happen
 
in all the animals. Well no! There are
 
a few animals where the young one looks
 
very different to an adult one, for
 
example, let's say a frog
 
So this is a young frog and this is an
 
adult one
 
Do you notice they both look so
 
different from each other? But if they
 
look so different from each other, then
 
how does the appearance of a young frog
 
changes drastically when it becomes an
 
adult one?
 
Let's find out. So to understand this, let
 
us look into the life cycle of a frog
 
An adult frog lays eggs, now
 
these are the eggs you see, now these
 
eggs, they will develop to form the
 
tadpole. These tadpoles are nothing but
 
the young babies of a frog and they
 
look so different from an adult frog, right?
 
Over a period of time, these tadpoles
 
will gradually you know form legs, hands
 
and now they'll become larger tadpoles
 
and these larger tadpoles again after
 
some time, they will turn to become an adult
 
frog. Now can you notice that this frog
 
It is looking so similar to its parents
 
Yes, so you just saw that the tadpoles
 
they undergo drastic changes to become
 
an adult frog
 
Similar thing happens with the silkworm
 
as well. So let us see the lifecycle of
 
a silkworm. In the life cycle of a
 
silkworm, at the young stage this
 
silk worm looks like a simple worm but
 
when it becomes in adult, it looks
 
like a moth. So when this adult moth
 
it lays eggs, these eggs, they develop
 
to form a larva or a simple silk worm. So
 
this worm, it is a simple worm which you
 
know simply crawls on a leaf. Now this
 
larva, it turns into a stage which is
 
called as a cocoon. Now inside the cocoon
 
drastic changes take place to turn this
 
larva into an adult moth. So basically this
 
is a young one and this is a adult moth
 
But do you see that how different they
 
look like, right?
 
Wow! We have seen two cases and we have
 
just realized that such drastic changes
 
are taking place in frog as well as in
 
silk worm to change this young one into
 
an adult one, right? And these drastic
 
changes are what we call metamorphosis
 
So metamorphosis has been
 
taken from two words meta and morphosis
 
where meta means to change and
 
morph means the form. So we can simply
 
define metamorphosis as the conversion
 
of a larvae into an adult one
 
through drastic changes. So students in
 
this lesson, you have seen on one hand
 
where there are animals which give birth to
 
young ones and these young ones, they
 
look very similar to their parents since
 
birth, but on the other hand there are some
 
other animals which when give birth to
 
young ones that don't look
 
similar to their parents. But these young
 
ones, they undergo drastic changes which
 
are known as metamorphosis and now they
 
become an
 
adult one.
