chapter 28 key points. simplest eukaryotes most diverse kingdom can be unicellular or...
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Protists are Highly Varied
Simplest EukaryotesMost diverse kingdomCan be unicellular or multicellular
ParaphyleticUnder reorganization
Evolutionary History
Evolved from cyanobacteria
Serial endosymbiosis Evidence:▪Separate DNA▪Multiple membranes▪Similar reproduction
Three Primary Groups
Animal-like Protists Ex: ciliates, euglenids,
diplomonadsPlant-like Protists
Ex: algaeFungus-like Protists
Ex: slime molds, water molds
Animal-Like Protists
HeterotrophsMobileOften cause disease
Sleeping sickness Malaria Chagas disease Dysentery
Plant-Like Protists
AutotrophsInclude largest protists (kelp)
Closest relatives of land plants
Used in food processingCan cause “red tide”
Fungus-Like Protists
Some produce fruiting bodies like fungi
Model for evolution of multicellularity
Often act as decomposers
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