Lab Report About Examination of Protozoan Cultures

1479 WordsDec 15, 20106 Pages
SAMPLE DESCRIPTIVE LAB REPORT Examination of Protozoan Cultures to Determine Cellular Structure and Motion Pattern Abstract Protozoans are unicellular eukaryotes with either plant- or animal-like characteristics. Through careful observation, we analyzed various protozoan cultures in order to identify characteristics associated with cell structure and movement of these one-celled organisms. We found that Protists exhibit certain characteristics that allow them to be categorized into different groups, mainly determined by their locomotion patterns. Despite differences in locomotion and the varying plant-like and animal-like organelles, all protists share key characteristics and functions that allow them to feed, grow, and…show more content…
The example protists were: Euglena, Paramecium, and Amoeba. Euglena moved with a flagellum and so is classified as a flagellate (see Fig. 1). Paramecium moved with cilia and so is classified as a ciliate (see Fig. 2). Finally, Amoeba moved with a pseudopod, and so is a sarcodine (see Fig. 3). All three protists had a nucleus, as expected, but the Paramecium had two nuclei, a micronucleus and a macronucleus. The Paramecium and Amoeba both had food and contractile vacuoles, but these were lacking in the Euglena. All protists had animal-like characteristics in terms of their movements and feeding patterns. Of the three, Euglena was the only one that had chloroplasts, an organelle common in plants. [pic] [pic] [pic] Discussion Protists seem to share certain characteristics even when they are classified into different groups. Their organelles are a mixture of animal and plant structures, but they all have nuclei, a feature which distinguishes Protists from other unicellular organisms. The protists’ motion was consistent with their locomotion organ: cilia, flagella, or pseudopod. This motion was very clear under the light microscope, but interactions of protists with others in the culture jar were better observed using the dissection scope. The Amoeba moves by extending part of its cell. This extruding part is the pseudopod, and allows the Amoeba to
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