MICRO LAB 5: Plant Cells -- Elodea
Prepare a wet mount slide of an Elodea leaf;
place it on your microscope and view it under low and medium power.
Answer the following questions.
Can you see small, individual cells?
color is the inside of the cell?
the color located in certain bodies or spread throughout the cell?
is the shape of the green bodies?
green bodies are called chloroplasts. you count in one cell?
many chloroplasts can you count in one cell?
substance gives these chloroplasts their color?
is the function of these chloroplasts in the cell?
the chloroplasts move around inside the cell?
If you see the chloroplasts moving, what must the fluid inside
the cell be doing?
is called cytoplasmic streaming.
Draw an elodea cell. Label all the structures you can see. Indicate
on your drawing the movement of the chloroplasts in the cell fluid
by marking the drawing with arrows.
11. How does the amount of light on the slide affect the movement
of the chloroplasts?
Observe the elodea cells under high power. Estimate the length
of an elodea cell in microns.
How many chloroplasts, placed end to end, would it take to reach
across the length of the cell?
What is the length of a chloroplast in microns? (Divide the number
of chloroplasts from question 13 into the length of the cell in
from question 12.)
C. Lift the cover glass. Remove the water by blotting gently
with a paper towel. Then add two or three drops of salt solution
and replace the coverglass over the elodea.
D. Observe the slide under low power and high power magnification
for about five minutes.
15. Can you see any difference in the appearance of these cells?
is the cytoplasm in these cells?
Do plant cells also have a cell membrane around the cytoplasm?
Draw one or two treated cells. Label the structures you can see.
You should be able to see five structures.
What materials do you think the salt solution removed from these
How could these cells be returned to their normal shape?
Try your idea.What happened?
What cell structures did the salt solution help you observe?