Download cell_variety_lab_

Cell Variety Lab
Name:
Period:
Background: Cell theory states that cells are the basic unit of life; this means that all living things are made of one or
more cells. Cells have some basic similarities in their structures, however cells have evolved to have many different
functions; human skin cells have a very different function than plant cells. These different functions have lead to
differences in the structure between cells of different types.
Objectives:
Identify, label, and describe the function of organelles. Compare and contrast plant and animal cells.
Pre-Lab:
1.
How can you adjust the amount of light that comes through the microscope?
2. What focus knob do you use when on the high powered objectives (40x and 100x)?
3. How do you prepare a wet mount microscope slide?
Part I: Elodea
1. Draw your observations in the given diagram
4x
10x
40x
2. Identify and write the function for each of the following structures (HINT: Chloroplasts are easier to see
near the vein of the leaf):
a. Cell Wall:
b. Chloroplasts:
c. Cell Membrane:
d. Central Vacuole:
3. Draw a large Elodea cell and label the structures identified above:
4. Describe the movement of the chloroplasts (If you don’t see them move say so)
5. List any parts you were unable to find:
6. Why might you have been unable to find these parts?
Part II: Onion Skin Cells
1. Draw your observations in the given diagram
4x
10x
2. List the cell parts that you can find:
3. Identify and write the function for each of the following structures:
a. Cell Wall:
b. Nucleus:
c. Cytoplasm:
d. Cell Membrane:
e. Central Vacuole:
4. Draw a large onion cell and label the structures identified above:
5. Why do you think there are no chloroplasts in onion cells?
Part III: Human Skin Cells
1. Draw your observations in the given diagram
4x
10x
2. Identify and write the function for each of the following structures:
a. Cell Membrane:
b. Nucleus:
c. Cytoplasm:
3. Draw a large human skin cell and label the structures identified above:
4. What was different between the onion cell and the human cell?
5. What was similar between the onion cell and the human cell?
Part IV: Amoeba
1. Draw your observations in the given diagram
4x
10x
40x
2. Identify and write the function for each of the following structures:
a. Cell Membrane:
b. Nucleus:
c. Cytoplasm:
d. Small Vacuoles
3. Draw a large amoeba and label the structures identified above:
Analysis Questions:
1.
How does the basic shape of the plant cells differ from the basic shape of the animal cells?
2. What structures did you only observe in the plant cells?
3. What structures did you observe in all of the cells?
4. Restate cell theory in your own words.