Survey of Protozoa - The Animal-like Protista
Tetrahymena thermophila is a freshwater unicellular ciliated protozoan related to Paramecium.
Though not technically an animal we will study some of the Protozoa. For this investigation students will observe and draw representative specimens from this group of unicellular organisms. Students will be responsible for knowing the anatomy, taxonomy, and ecological importance of several organisms. If you lost your copy of the activity you can download it here.
A super resolution light microscope image of the surface (or cortex) of Tetrahymena thermophila where red is labeling the microtubules of the cilia and green is labeling a microtubule-associated protein or MAP. T. thermophilia has been involved in at least two Nobel Prizes, one for the discovery of ribozymes in 1989 and the second for the structure of telomeres and their role in aging in 2009. Credit: Mayukh Guha PhD and Jacek Gaertig PhD, Department of Cellular Biology, University of Georgia, Athens, GA
Kingdom Protista - answer the following questions
- What is the difference between a Protista and a Protozoa?
- Describe four methods of locomotion among protozoa.
- Protists reproduce sexually and asexually; list and describe the specific ways they reproduce.
- How is conjugation advantageous for ciliates, such as Paramecium?
- What are pseudopodia? They come in a variety of forms. Name and describe all four.
- What is a cyst? Under what conditions might certain protozoa form cysts?
- A test is a shell-like substance secreted by different Protista. What are the four different materials that may make up the composition of a test.
- There are many forms of parasitic protists. Pick one, draw and label the life cycle. Identify which is the intermediate host, the vector, the definitive host.
- If you were traveling out of the country and were concerned about contracting amoebic dysentery, what steps could you take to avoid contracting the disease? How and why would the precautions differ if you were going to a country where malaria is a problem?