mammals scales gills limbs lungs lungs viviparous wings dry oviparous bones scales mammals underwater five four moist feathers water slither lungs gills vertebrate
There
are
groups
of
vertebrates
.
Vertebrates
are
animals
which
have
.
Mammals
are
because
they
born
from
their
womb's
mother
.
Birds
,
amphibians
,
fish
and
reptiles
are
.
They
incubate
their
eggs
.
Baby
drink
their
mother's
milk
.
All
mammals
breathe
with
.
Baby
amphibians
breathe
with
but
when
they
grow
,
they
breathe
with
.
Reptiles
are
animals
Most
mammals
have
legs
.
Some
reptiles
can
swim
,
walk
,
run
or
.
Birds
have
and
two
.
Fish
breathe
with
.
Dolphins
and
bats
are
.
Most
amphibians
have
four
and
have
skin
.
Some
reptiles
spend
part
of
their
time
in
the
.
Birds
breathe
with
.
Reptiles
have
skin
and
that
protect
their
body
.
Fish
have
,
fins
and
a
tail
.
Fish
only
live
.