2. Amoebas. Go Here to Fill in Part One: Background Info

SCIENCEName ______
Single Celled Organisms – Protists

Mr. R Science

1. Click hereto watch The Hidden Life in Pond Water. As you do so, draw 3 of the freaky things that you see in the space below.

2. Amoebas. Go here to fill in Part One: Background Info.

A protist is any ______that cannot be classified as a plant, animal, or fungus. There are several types of protists. We will be learning about three types of protists:______, ______, and ______. In this lab you will be observing a type of protist called a protozoan. A protozoan is a protist that is similar to an ______. All protozoans are ______and hunt or search for their food.
One way protozoans are classified into groups is by how they______. In general, there are three ways protozoans move: by ______, by ______, or by ______.
How does an amoeba move?

What does the word pseudopod mean?

What are the the two functions of the pseudopod?

Part Two - Observing movementObserve the movement of the amoeba in the video below. Draw what it looks like at 0 seconds, 15 seconds, and 30 seconds. Draw an arrow on each of your pictures indicating where the cytoplasm is moving.

If the video link doesn’t work, click here. Click here anyway to see an Amoeba eating 2 paramecium.

Part Three – Cell Structures – Read and Observe.

Part Four – Labeling the Diagram

Label the diagram below with the following parts: cell membrane, contractile vacuole, food vacuole, nucleus, and pseudopod.

Questions for Reflection

1. How is the amoeba an example of an organism? (Hint: think of the characteristics all living things have in common.)

1. How would you classify an amoeba: animal-like, plant-like, or fungus-like? Why? Support your answer with evidence.

3. Paramecium. Go here:
Read the Background info and then fill in the blanks below.

The protozoa you will observe today is called the paramecium. A paramecium is unicellular and moves by using ______. Cilia ______structures that are found on the surface of the organism. Cilia have three uses: 1. ______2. ______3. ______. When you observe the paramecium it may look like it only has cilia on part of its cell. In fact, the entire cell is covered in cilia! Think of it like a furry stuff animal. All of it is covered in hair. Similarly, all of the paramecium is covered in cilia, not just the "edge" of it. Observe the video below to see the cilia move on the paramecium. Click here if the video doesn’t work – Click here anyway to see a paramecium eating.

Part Two – Cell Structures
Describe how the paramecium eats. [Make sure to include the term oral groove]

Why does the paramecium have two nuclei? Describe the function of each.

Part Four – Labeling the Diagram
Label the diagram below with the following parts: anal pore, contractile vacuole, cytoplasm, cilia, food vacuole, oral groove, pellicle, large nucleus, small nucleus

Questions for Reflection

1. How is the paramecium an example of a living thing? (Hint: think about what all living things have in common)
2. How do the structures of the paramecium help it survive? Give specific examples.
3. How would you classify this paramecium: animal-like, plant-like, or fungus-like. Why?
4. Argue a position on this claim: "A paramecium is an example of a simple organism." Do you agree or disagree? Why? How would you respond to someone who holds the opposite position?

4. Euglena. Go here:

A euglena is an autotrophs---they use ______to make their own food.
The algae you will observe today is called a euglena. It is a type of euglenoid. Euglena are examples of algae because its cell contains chloroplasts which allow it to carry out photosynthesis. However, scientists have observed that euglena can also be heterotrophs; they can also eat to obtain energy!
Describe three adaptations that Euglena have and what uses they have for them.

Part Two – Watch the Euglena videos and try to ID the Euglena parts. Click here as well.

Part Three - Labeling the Diagram

Label the diagram below with the following parts: chloroplast, contractile vacuole, flagellum, nucleus, paramylon granule, pellicle, and eye spot (stigma)

Part Four - Reflecting

Answer the following questions.
1. Euglena contain chloroplasts. When light is limited, they can eat particles to obtain energy. Are these organisms classified as heterotrophs or autotrophs?
2. Name two organelles you could find in a euglena that you couldn't find in a zooflagellate (paramecium)
3. You place millions of euglena into a container and place it by the window. The entire container is a bright green color as the euglena swim freely. You cover half the container, block out the sunlight. At the end of the day, you return to the container and find that all the euglena are now on the uncovered side. Explain why this happened. Your answer must include the works: eye spot (stigma), sunlight, and photosynthesis.

5. Diatoms - Watch this video and draw three diatoms in the space below.
Diatoms are single-celled variety of algae and among the most common types of phytoplankton.