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Protists - • locomotor organelles provides mov’t o...

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Protists protists  - probably developed due to endosymbiosis  most diverse kingdom in Eukarya domain symbiotic/aerobic bacteria >> mitochondria o most similar to nonsulfur purple bacteria o proteins for respiration embedded within folds of membrane symbiotic/photosynthetic bacteria >> chloroplasts o 3 different classes of chloroplasts (red, green, algae) >> separate paths of evolution mitochondria/chloroplasts both have their own circular DNA o replicates through splitting o similar size/membrane structure as prokaryotes evolution of mitosis/cytokinesis not shown in any way about 60 protists don’t have definite places on the phylogeny tree general protist characteristics  - non-fungi, non-plant, non-animal eukaryotes  unicellular/multicellular, some form colonies cell surface - ranges from simple plasma membrane to extracellular material deposits
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Unformatted text preview: • locomotor organelles - provides mov’t o mainly through flagella (single or cilia) or pseudopodial (false foot) mov’t o lobopodia - large pseudopods used by amoeba o filopodia - thin, branching pseudopods o axopodia - supported by microtubules to move through extension/retraction • cyst formation - dormant forms of cells w/ resistant outer coverings o cell metabolism shuts down • nutrition - only chemoautotrophic nutrition not used (only found in prokaryotes) o phototrophs - photosynthetic o phagotrophs - ingests visible food particles o osmotrophs - ingests food in soluble form • reproduction - usually asexual o sexual reproduction during times of stress o binary fission - cell splits in 2 o budding - fission where new cell is much smaller than parent o schizogony - multiple fission...
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