Ciliphora - (Ciliates) -
They
have
complex
cells,
that
range
in
size
from
10
µm
to
3
mm.
They
are
characterised
by
rows
of
hairlike
appendages,
the cilia,
which
structurally
are
similar
to
flagella
showing
9+2
arrangement.
However,
they
do
not
lash
about.
Rather,
they
beat
synchronously
similar
to
the
motion
of
the
teeth
of
a
comb
as
you
pass
your
finger
down
the
row.
This
provides
a
smooth,
even
motion
in
Contrast
to
the
jerky
motion
of
the
flagellates.
There
is
single
large
macronucleus
and
one,
or
more
micronuclei.
During
sexual
conjugation,
two
cells
make
contact
and
a
cytoplasmic
bridge
forms
between
them.
A
micronucleus
in
each
cell
undergoes
two
divisions
to
form
four
micronuclei
per
cell.
Three
micronuclei
disintegrate
and
the
remaining
one
undergoes
division.
An
exchange
of
micronuclei
takes
place.
The
cells
separate,
the
micronuclei
fuse,
and
a
new
micronucleus.
