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19 terms

Gen Bio I Ch 28

Protists
STUDY
PLAY
What is Protist?
informal name of kingdom of mostly unicellular eukaryotes
What ARE and AREN'T protists?
ARE: eukaryotic, AREN'T: plants, animals, fungi
Protist diversity has origins in ____?
endosymbiosis
Mitochondria evolved by endosymbiosis of an ____?
aerobic prokaryote
What are plastids?
circular chromosomes
Plastids evolved by endosymbiosis of a ___?
photosynthetic cyanobacteria (blue green algae)
Plastids bearing lineage of protists evolved into what?
red algae and green algae
What are Excavates?
protist group, have exoskeleton, modified mitochondria, unique flagella, specialized feeding grove like mouth looks like it was "excavated away"
Clade Euglenozoa?
clade of excavates, spiral or crystalline rod of unknown function inside flagella. (Kinetoplastids & Euglenids)
What are Chromalveolates?
protist group, may have evolved from secondary endosymbiosis, split between Alveolates & Stramenopiles
Clade Alveolata?
clade of Chromalveolates (Dinoflagelates, Apicomplexans & Ciliates)
Clade Stramenopiles?
clade of Chromalveolates (Diatoms, Golden Algae & Brown Algae)
What are Rhizaria?
protist group, (Foraminiferans & Radiolarians)
What are Archaeplastida?
protist "supergroup" that includes red algae, green algae & land plants
Heterotrophic protist acquired ___ 1 bya?
cyanobacterial endosymbiont. *It's photosynthetic descendent evolved into red & green algae
Land plants descended from ___?
Green Algae
What are Unikonta?
protist "supergroup", include protists that are closely related to fungi and animals (Amoebozoans & Opisthokonts)
What are Amoebozoans?
clade of Unikonta (Slime Molds, Gymnamoebas, Entamoebas & Choanoflagellida)
What remains controversial about the eukaryotic tree?
Its root