Students should be able to:
Unlike bacteria which are prokaryotic, protists are eukaryotic, i.e., are characterized by membrane-bounded organelles. Taxonomically, the group constitutes the Kingdom Protista. It is very complex and diverse in respect to cellular structure, nutrition and many other biological characteristics. The concept of one kingdom for such a diverse group is being challenged, for a number of taxonomists are arguing in favor of splitting up the group into six or more kingdoms to reflect obvious evolutionary differences. Cell structural variations amongst members of the group include unicellular, filamentous, colonial, and multicellular forms. The multicellular members are undifferentiated. The specialized protection for either the gametes or zygotes, as seen in plants, is generally lacking.
Members include protozoa, algae, and slime molds. Each of these three subgroups is further divided into several hierarchical groups. For example, the unicellular, heterotrophic protozoa, are divided into pseudopods, flagellates, and ciliates on account of their locomotory structures. Modes of nutrition include heterotrophism (by absorption, ingestion, and parasitism), and autotrophism (by photosynthesis). Asexual reproduction is usual mode of propagation but sexual reproduction is also common.
Pre-Lab Activity #1 - Protist Taxonomy
Using information from your text, the Learning Resource Center (LRC), or the World Wide Web, make a list of:
The major taxonomic groups (Phyla, singular noun, Phylum) of the Kingdom Protista. Indicate which members are photoautotrophs or heterotrophic (by ingestion or parasitism). Use the chart provided in Question #2 in the Pre-Lab Questions.
Pre-Lab Activity #2 - Economic Uses of the Protists
Using information from your text, the Learning Resource Center (LRC), or the World Wide Web, find 5 uses of economic importance for the members of the Protista. Attach this to your Pre-Lab Questions.
Pre-Lab Activity #3 - Protist Images
Using any resources available to you find and print out imagery of the following:
Pre-Lab Activity #4 - Data Collection Sheet
Download and print out the Data Collection Sheet for Protists
The Laboratory Activities and Data Collection
Lab Activity #1 - Mixed Protozoa
Lab Activity #2 - Observation and Comparison of Additional Protist Slides
Note: *A, B, C, and D refer to specimens of rhizopod (an Amoeba), foraminiferan (a Foram), ciliophora (a Ciliate), and Zoomastogophora (a Flagellate).
Lab Activity #3 - Wet Mount Slide of a Representative Green Algae
Note: * Specimen E = Spirogyra culture (or equivalent)
Lab Activity #4 - Examination of Representatives of the Brown Algae
* Specimens F and G are preserved Fucus and Sargassum
Lab Activity #5 - Examination of Additional Members of the Kingdom Protista
* Specimens H, I, and J are prepared slides of Trypanosoma, Plasmodium, and Plasmodial Slime molds, respectively.
Post-lab Activity and Data Analysis
Results and Analysis