BIOL 2030 Lecture Notes - Protist, Motility, Archaea
Document Summary
Protozoa: animal-like protists, classified by their movements. Cilia-small hair-like structures that that surround the body of protists. Flagella- longer than cilia and much fewer in number. Taxonomy of these organisms is dynamic , therefore these classifications may change: ameobas (sarcodina)- move and feed by pseudopodia. Rhizopodans-locomotion by lobopodia, filapodia(doesn"t rejoin) or cytoplasmic flow . eg. amoeba: phylum euglenozoa- movement by flagella. Most develop a spore(oocyst ) at some point in their life cycle. Class coccidea- eg. plasmodium (malaria: phylum ciliophora- possess cilia. Flagellum anterior; second very short flagellum also aids in locomotion. Movement also carried out by worm like contraction and expansion of body (euglenoid movement) Flagellum also acts as sensory organ (exploring surroundings)- arises from reservoir. Base of flagellum theres an eyespot (stigma) Chloroplast bodies very obvious its shape and arrangement is used to determine the species of euglena. Streaming protoplasm in the leading pseudopodium that is used for locomotion and feeding. Pseudopodium: part of the amoeba used for locomotion.
