Chapter 28 SG - Chapter 28 Protists- discovered mostly in...

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Unformatted text preview: Chapter 28 Protists- discovered mostly in aquatic environments under microscope; originally Protista but that would be paraphyletic since most of it relates with either animals, plants or fungi more than it does with other protists; simplest eukaryotes but highly complex at cellular level a. Nutritional Diversity- photoautotroph (light energy and takes inorganic compounds for C), heterotrophs (other-feeders) and mixotrophs (compine both photosynthetic and heterotrophic nutrition) b. Ecological Diversity- either algae (photsynth/plant-like), protozoan (ingest/animal-like), or absorptive fungi-like no-names c. Habitat Diversity- lives anywhere aquatic: ponds, leaves, soil, etc.; essential constituents for plankton (Phytoplankton marine food web); may also live as symbionts within other organisms d. Reproductive Diversity- some just asexual, some sexually reproductive (through meiosis or syngamy) Endosymbiosis- engulfing or entering other organisms is key for diverse nature of protists (cyanobac chlor red&green alga); through this, integration of endosymbiont DNA with host DNA allows both to take on each others characteristics (i.e. photosynth. symbiontintegration of endosymbiont DNA with host DNA allows both to take on each others characteristics (i....
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