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Posted by: middle child on 2010-03-16, 12:30:48
1 Protists can be free-living, or they may live symbiotically with another organism. 2 Many protists are economically important and beneficial to mankind, while others cause fatal diseases. 3 Protists make up the majority of the plankton in aquatic systems, where they serve as the base of the food chain. 4 The nuclei of protists contain chromosomes, with DNA associated with proteins 5 It is unknown whether protists were the precursors to plants, animals, or fungi. 6 It is possible that several evolutionary lines of protists developed separately. en.wikipedia.org/ wiki/ Protista |
