Eukaryotic Microorganisms ••Types ––Protozoa ––Fungi ––Algae Cell Structure ••Complex ––Internal membrane bound organelles ––Some with high degree of external/surface complexity ••Generally much larger than prokaryotic cells ••Asexual and sexual reproduction Protozoa ••Structurally the most complex ––No cell wall - some with glycocalyx type covering (pellicle) ––Some with ••External appendages (cilia, flagella) ••Feeding structures (oral grooves and gullets) ••Multiple nuclei ••Complex membrane movements ––Some can be very large - up to 1mm Motility ••Many species motile ••Mechanisms ––Cilia ––Flagella ––pseudopods Specialized Protozoan Structures ••Feeding structures (“mouth” parts) ••Appendages ••Water removal structures ••Support structures Fungi ••Cell wall present ––Common component - chitin ••Simple cell morphology ––Yeasts - Spherical to oval cells ––Hyphae - Hollow cylindrical, often branching, multiple cells forming fibrous network ••Reproduction ––Spores - formed in specialized structures ––Budding Algae••Micro and macroscopic forms ••Cell wall present - cellulose ••Photosynthetic – have chloroplasts ••Asexual and sexual reproduction ––Some with motile gametes Basic Cell Structures ••Same basic organelles as all eukaryotic cells ––Cell membrane ––Nucleus ––Mitochondria ––ER ––Golgi ––Others ••Review basic structure and function – self study ••Endosymbiont Theory Dental Plaque biofilms – exosymbionts? End ••Go to: Nutrition and
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