Download Problem: How do animal and plant cells differ? Materiars fu IEt

Name
Date
Class
Cetts
Problem: How do animal and plant cells differ?
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Skills
observe, compare, use a microscope
Materiars
fu IEt
10. Locate the cell wall, chloroplasts, nucleus,
and cytoplasm. Fill in the table.
11. Draw and label the cell wall, chloroplasts,
nucleus, and cytoplasm of an Etod,ei celL.
Iight microscope
2 glass slides
2 coverslips
dropper
methylene blue stain
toothpiek, flat type
Elod.ea leaf
water
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Procedure
1. Study the data table.
Cell part
Cheek cell
parts present
Elodea cell
parts presenl
Cytoplasm
Nucleus
Chloroplast
Cellwall
Cell membrane
2. Put a drop of stain
8.
4.
b.
6.
on a slide. Gently scrape
the inside of your cheek with a toothpick.
CAUTIONz Do not scrape hard enough to
injure your cheek.
Rub the toothpick in the stain. Break the
toothpick in half and discard it as your
teacher directs.
Cover the slide with a coverslip.
Use a microscope: Look at the cheek cells
under low power, then high power.
Locate the nucleus, cytoplasm, and cell
membrane. Fill in the table by putting a
check mark in the box if the cell part can be
Data and Observations
I.
Describe the shape of a cheek cell.
2. Describe the shape of an Elodca ceLl.
3. Compare: What parts did you see in both
cells?
seen.
Draw and label the nucleus, cytoplasm, and
cell membrane of a cheek cell.
8. Prepare a slide of an Elodna leaf. Put an
Elod.ea leaf in a drop of water on a slide.
Add a coverslip.
9. Look at the Elodea cells under low power,
then high power.
7.
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4. What parts are found in plant cells that ar
absent in animal cells?
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nalyze and Apply
i. What do the ce}l parts
found only in plant
4. Which part of a plant ceII give shape to the
cell?
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cells do?
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b. Why are stains such as methylene blue used
when observing cells under the microscope?
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6.
Apply: Why don't animal cells have
chloroplasts? (HINT: How do animals get
energy?)
Is the nucleus always found in the center of
the cell?
Extension
Which part of an animal cell gives shape to
the cell?
Observe other plant and animal cells under the
microscope. How are they different from cheek
cells and Elodea cells? How are they alike?
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Comparing Plant & Animal Cells
Page 1
Comparing Flant and Animal
of2
CelEs
Problem: How are plant and animal cells alike? How are they different?
will view cells from your cheek (animal cells) and cells from elodea, which is
plant.
a water
Careful observation should reveal similarities and differences between the cells.
Procedure: In this lab, you
Cheek Cells
Gently scrape a toothpick over the inside of your cheek and swirl it in a drop of methylene blue to stain
the cells (otherwise they will be clear and difficult to see). You are looking for light colored blobs with
dark spots in them. Perfect circles with black outlines are airbubbles. Don't sketch those. Sketch the
cheek cells under low and high power. Make swe you are drawing your cells to SCALE - that is, the size
of your drawing should reflect the size that you view them in the microscope.
Low Power
High Power
1. Identify the NUCLEUS on
your drawing.
2. Identify the CELL
MEMBRANE on your
drawing.
3. Identiff the CYTOPLASM
(area) on your drawing.
Elodea Cells
Cut a small peice of elodea leaf and prepare a wet mount. When you are looking for cells, you should
find a lot more than you found with the cheek cells, and it will resemble a green brick wall. Sketch your
cells under low and high power, also paying attention to scale. The nucleus of these cells will not be
visible but you should see many chloroplasts within each cell. Plant cells also have a rigid cell wall,
outside the cell membrane. The Cell wall should also be visible.
Low Power
High Power
Identify the
CHLOROPLASTS onyour
drawing.
1.
2. Identifu the CELL WALL
on your drawing.
3. Identifr the CYTOPLASM
(area) on your drawing.
4. Identify the CENTRAL
http://www.biologycorner.com,/worksheets/comparing plant animal.html
t/3/2010
Comparing Piant & Animal Cells
Page? of2
VACUOLE on your drawing.
Analysis - Venn Diagram
Create a Venn Diagram of plant and animal cells. Remember, things that they have in conlmon go
into
the overlapping area, things that are different go in the non-overlapping area.
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lant_animal. html
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