HI310 Lecture 3: Protist-Study-Guide
24 Jan 2019
Department
Course
Professor
Document Summary
Some are mixotrophs which combine photosynthesis and heterotrophic nutrition. Three different categories: photosynthetic (plant-like) protists, like algae, ingestive (animal-like) protists, like protozoan s, absorptive (fungi-like) protists, which have no general name. Most protists are aquatic and are found almost anywhere there is water. Reproduction and life cycles are highly varied among protists. Some are exclusively asexual; others can also reproduce sexually or at least employ the sexual processes of meiosis and syngamy. Protists found in these clades lack plastids and their mitochondria do not have dna, electron transport chains or enzymes that are normally needed for the citric acid cycle. In some species the mitochondria are very small, and produce cofactors for enzymes involved in atp production in the cytosol. Most diplomonads and parabasalids are found in anaerobic environments. Have two equal sized nuclei and multiple flagella. An example of a diplomonad would be giardia intestinalis a parasite which inhibits the intestine of mammals.
