Name:__________________________________________

microscopeComparing the Ameba to the Paramecium

Objective: In this lab you will observe a living ameba and a living paramecium. Both belong to the Kingdom Protista and are also sometimes called protozoa. Each specimen moves in a unique way. Your task is to analyze and compare the protozoan movements.

Materials: Paramecium culture, Ameba culture, microscope slides, cover slips, cotton, microscopes; (optional preserved slides)

Viewing the Ameba

1. Obtain a slide of ameba.
2. Do NOT use a coverslip
3. Focus under scanning power and then low power. Do NOT use high power.
4. Complete data section.

Viewing the Paramecium

1. Obtain a slide of paramecium. At this point there is no coverslip.
2. Focus under scanning and low power.
3. Add a few strands of cotton and a coverslip. (The cotton will help slow the paramecium down)
4. Refocus using High Power.
5. Complete data section

Ameboid Movement

1. Over a 10-15 minute period, draw the ameba four times. Pay special attention to the shape.

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2. Describe in your own words how the ameba moves.


3. Draw the ameba and label the: Endoplasm, Ectoplasm, Cell Membrane, Pseudopodia

 

 

Paramecium

3. Over a 10-15 minute period, draw the paramecium four times.

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4. Describe how the paramecium responds to the cotton fiber on the slide.

 

5. Estimate how many paramecium are on your slide.

6. Draw your paramecium.
Label: Nucleus, Oral Groove, Cell Membrane, Cilia, Contractile Vacuole

 

 

Analysis

7. Compare the movement of the paramecium to the movement of the ameba.

 

8. How are the paramecium and the ameba alike?

 

9. How are the paramecium and the ameba different?

 

10. Compare the shape of the paramecium to the shape of the ameba.