Chapter 28 Key Points

 Simplest Eukaryotes  Most diverse kingdom  Can be unicellular or multicellular  Paraphyletic  Under reorganization

 Evolved from cyanobacteria  Serial endosymbiosis  Evidence: ▪ Separate DNA ▪ Multiple membranes ▪ Similar reproduction

 Animal-like Protists  Ex: ciliates, euglenids, diplomonads  Plant-like Protists  Ex: algae  Fungus-like Protists  Ex: slime molds, water molds

 Heterotrophs  Mobile  Often cause disease  Sleeping sickness  Malaria  Chagas disease  Dysentery

 Autotrophs  Include largest protists (kelp)  Closest relatives of land plants  Used in food processing  Can cause “red tide”

 Some produce fruiting bodies like fungi  Model for evolution of multicellularity  Often act as decomposers