Download At work: Finding out about Amoeba Copymaster Information Finding

Information
Finding out about Amoeba I
At work: Finding out about Amoeba cell surface
membrane
Finding
Finding out
out about
about Amoeba
Amoeba II
ectoplasm
Amoeba1 (Amoeba spec.) lives in mud or on stones at
the bottom of ponds. It is a very simple, single-celled
1
organism.
Amoeba
Amoeba1 (Amoeba
(Amoeba spec.)
spec.) lives
lives in
in mud
mud or
or on
on stones
stones at
at
endoplasm the bottom of ponds. It is a very simple, single-celled
the bottom of ponds. It is a very simple, single-celled
This single cell does all the jobs which are necessary
organism.
contracile
organism.
vacuole
to keep it alive: It moves, takes up food and water,
2
3
4
and excretes
waste
, is sensitive
to stimuli
respires
This
nucleous
This single
single cell
cell does
does all
all the
the jobs
jobs which
which are
are necessary
necessary
and
can grow
andmoves,
reproduce. up food and water,
to
food
to keep
keep 2it
it alive:
alive: It
It moves, takes
takes
up
food
and
water,
3
4
vacuole
respires
and excretes
excretes waste
waste3,, is
is sensitive
sensitive4 to
to stimuli
stimuli
respires2 and
Amoeba
is very small:
It is only as big as a pinhead.
and
and can
can grow
grow and
and reproduce.
reproduce.
The diagram shows you what it looks like.
Amoeba
Amoeba is
is very
very small:
small: It
It is
is only
only as
as big
big as
as a
a pinhead.
pinhead.
Amoeba
moves
slowly
over
stones
andlike.
algae5.
The
diagram
shows
you
what
it
looks
The diagram shows you what it looks like.
It changes its shape all the time. Its cell surface mem5
brane
is very thin
and flexible,
and the cytoplasm
can
Amoeba
Amoeba moves
moves slowly
slowly over
over stones
stones and
and algae
algae5..
pseudopodium
flow
from one
part of
the
cell
to another.
The ‘endoIt
changes
its
shape
all
the
time.
Its
cell
surface
memIt changes its shape all the time. Its cell surface memplasm’
in the thin
centre is flexible,
very liquid, and
the ‘ectoplasm’
brane
brane is
is very
very thin and
and flexible, and
and the
the cytoplasm
cytoplasm can
can
in thefrom
partsone
close
toof
the
cell
surface
membrane
is like
flow
part
the
cell
to
another.
flow from one part of the cell to another. The
The ‘endo‘endoa jelly. All
this makesisitvery
possible forand
the cell‘ectoplasm’
to form a
plasm’
plasm’ in
in the
the centre
centre
is very liquid,
liquid, and the
the ‘ectoplasm’
6
–to
a ‘false
foot’.
pseudopodium
in
the
parts
close
the
cell
surface
membrane
in the parts close to the cell surface membrane is
is like
like
a
jelly.
All
this
makes
it
possible
for
the
cell
to
form
a jelly. All this makes
it possible for the cell to form a
a
6
pseudopodium
pseudopodium6 –
–a
a ‘false
‘false foot’.
foot’.
If amoeba comes upon food, e.g. bacteria or other small single-celled organisms, it uses its pseudopodia to flow around the food and form a food vacuole7 around it. Chemicals in the cytoplasm then
taken up by single-celled
the cytoplasm.
There are always
several food
break
down the food,
and thee.g.
nutrients8 are
If
organisms,
If amoeba
amoeba comes
comes upon
upon food,
food, e.g. bacteria
bacteria or
or other
other small
small single-celled
organisms, it
it uses
uses its
its pseupseu7
vacuoles in flow
amoeba.
dopodia
a
food
vacuole
7 around it. Chemicals in the cytoplasm then
dopodia to
to flow around
around the
the food
food and
and form
form
a
food
vacuole
around
it.
Chemicals
in
the
cytoplasm
then
8
break
There
are
always
several
food
break down
down the
the food,
food, and
and the
the nutrients
nutrients8 are
are taken
taken up
up by
by the
the cytoplasm.
cytoplasm.
There
are
always
several
food
There is ainsecond
type of vacuole in amoeba: the contractile vacuole9. It becomes bigger and smaller at
vacuoles
vacuoles in amoeba.
amoeba.
10
regular intervals . The contractile vacuole is very important, because water flows into the cell all the
time
across
the cell surface
membrane.
This watercontractile
must be pumped99out
again, or the celland
will burst11 at
There
There is
is a
a second
second10type
type of
of vacuole
vacuole in
in amoeba:
amoeba: the
the contractile vacuole
vacuole .. It
It becomes
becomes bigger
bigger and smaller
smaller at
after
a short time.
The contractile vacuole helps
to prevent this:
it takes up the
water that
flows
in, and
regular
regular intervals
intervals10.. The contractile vacuole is
is very
very important,
important, because
because water
water flows
flows into
into the
the cell
cell all
all the
the
11 12
becomes
bigger
andsurface
bigger. membrane.
The vacuoleThis
moves
to the
cellbesurface
membrane
and
bursts
like
aburst
pricked
time
across
the
cell
water
must
pumped
out
again,
or
the
cell
will
time across the cell surface membrane. This water must be pumped out again, or the cell will burst11
balloonshort
when it is too
full, so the water
is set free.
after
after a
a short time.
time. The
The contractile
contractile vacuole
vacuole helps
helps to
to prevent
prevent this:
this: it
it takes
takes up
up the
the water
water that
that flows
flows in,
in, and
and12
becomes
bigger
and
bigger.
The
vacuole
moves
to
the
cell
surface
membrane
and
bursts
like
a
pricked
becomes bigger and bigger. The vacuole moves to the cell surface membrane and13 bursts like a pricked12
Amoeba
needs oxygen
to set free
the energy
in its food. This is called respiration . In this process
balloon
balloon when
when it
it is
is too
too full,
full, so
so the
the water
water is
is set
set free.
free.
carbon dioxide is made. The oxygen can get into the cell across the cell surface membrane. The carbon
13
dioxide and other
waste substances
leave theincell
(“theyThis
are excreted”)
in the same
way –process
across the
Amoeba
Amoeba needs
needs oxygen
oxygen to
to set
set free
free the
the energy
energy in its
its food.
food. This is
is called
called respiration
respiration13.. In
In this
this process
membrane.
Theisfact
thatThe
theoxygen
membrane
is so
thin
helps
with
this.
carbon
dioxide
made.
can
get
into
the
cell
across
the
cell
surface
membrane.
carbon dioxide is made. The oxygen can get into the cell across the cell surface membrane. The
The carbon
carbon
dioxide
and
other
waste
substances
leave
the
cell
(“they
are
excreted”)
in
the
same
way
–
across
dioxide and other waste substances leave the cell (“they are excreted”) in the same way – across the
the
membrane.
membrane. The
The fact
fact that
that the
the membrane
membrane is
is so
so thin
thin helps
helps with
with this.
this.
7
Amöbe; Wechseltierchen (Sg. amoeba; Pl. amoebae)
Nahrungsvakuole
8
atmet
Nährstoffe
13 scheidet Abfallstoffe aus
79 kontraktile Vakuole
1 Amöbe; Wechseltierchen (Sg. amoeba; Pl. amoebae)
7 Nahrungsvakuole
Amöbe; Wechseltierchen (Sg. amoeba; Pl. amoebae)
Nahrungsvakuole
10
24 reizempfindlich
8 regelmäßige Abstände
2 atmet
8 Nährstoffe
atmet
Nährstoffe
119
35 Algen (Sg.: alga; Pl. algae)
kontraktile Vakuole
3 scheidet Abfallstoffe aus
9platzen
scheidet
Abfallstoffe
aus
kontraktile Vakuole
6
12
4
10
Pseudopodium,
Scheinfüßchen
angestochen
reizempfindlich
regelmäßige
Abstände
4
10
reizempfindlich
regelmäßige
Abstände
13
5 (Sg. pseudopodium; Pl. pseudopodia)
11 Atmung
Algen
(Sg.:
alga;
Pl.
algae)
platzen
5
11
Algen (Sg.: alga; Pl. algae)
platzen
6
12
6 Pseudopodium, Scheinfüßchen
12 angestochen
Pseudopodium, Scheinfüßchen
angestochen
13
(Sg. pseudopodium; Pl. pseudopodia)
13 Atmung
(Sg. pseudopodium;
Pl. pseudopodia)
Atmung
Informationsseite
und Grafik
aus: Linder Bilingual Workbook. Cells.
ISBN: 978-3-507-86676-8, Schroedel 2008, S. 24
1
2
Informationsseite und Grafik aus: Linder Bilingual Workbook. Cells. ISBN: 978-3-507-86676-8, Schroedel 2008, S. 24
Informationsseite und Grafik aus: Linder Bilingual Workbook. Cells. ISBN: 978-3-507-86676-8, Schroedel 2008, S. 24
© Bildungshaus Schulbuchverlage Westermann Schroedel Diesterweg Schöningh Winklers GmbH, Braunschweig 2011, Autor: Jörg Addicks
Information
Information
Copymaster
At work: Finding out about Amoeba Copymaster
WorksheetWorksheet
“Finding out
“Finding
about out
Amoeba”
about Amoeba”
© Bildungshaus Schulbuchverlage Westermann Schroedel Diesterweg Schöningh Winklers GmbH, Braunschweig 2011, Autor: Jörg Addicks
a) Read the texta)
and
Read
look
the
at text
the picture.
and lookShow
at thewhich
picture.
substances
Show which
go insubstances
and out ofgo
amoeba.
in and Draw
out ofarrows
amoeba. Draw arrows
and label them. and label them.
b) Prepare a Mini-Presentation
b) Prepare a Mini-Presentation
using the pictureusing
as a visual.
the picture
(You as
cana draw
visual.it(You
on the
canboard
drawor
it on
usethe
theboard or use the
transparencies provided).
transparencies
You have
provided).
got tenYou
minutes
have got
preparation
ten minutes
time.
preparation
You can work
time.
with
Youyour
can table
work with your table
group.
group.