BIO 124 Lecture Notes - Lecture 11: Body Plan, Trichomonas, Saprotrophic Nutrition
21 Mar 2016
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Document Summary
What is a protist: a eukaryoke that does not fit into one of the other classic kingdoms, informally classified by ecological role. Photosynthesis: can produce organic compounds and oxygen. Feed by absorbing small molecules or ingesting prey (diatoms) Some are saprophytic: grow on decaying organic matter. More closely related to diatoms than fungi. Resemble fungi in body form and absorptive nutrition: informally classified by habitat. Particularly common and diverse in oceans, lakes, wetlands, and rivers. Occur primarily as single cells, colonies, or short filaments. Protozoan plankton heterotrophic: informal groups of protists. Small in shape (so they can float) Phytoplankton blooms occur in the spring and a less extent in the fall. Communities of microorganisms (not just protists) that occur on underwater surfaces. Grow attached to underwater surfaces: rocks, sand, docks, ship hulls, offshore, informally classified by motility platforms. Many move actively, but others are sedentary: sedentary forms use f, flagellum for food capture and reproduction.
