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Protists
• Eukaryotes that are not plants, animals or fungi
• Area of intense research
• Taxonomy in flux
Protists ≠ Clade
• Informal Groups:– Algae– Protozoans– Fungal-like protists
• Photo Credit of Kelp: Stef Maruch, 2007, Wikimedia Commons
Body Organization
• Unicellular• Colonial• Multicellular
Dinobryon, a colonial golden brown alga
Bonnemaisonia hamifera (a red alga)
Membrane Transport
• Gas exchange
• Waste disposal
• Water balance
• Ion balance
Ciliates (Stentor and Paramaceium)
Water Balance
• Watch videos of Contractile Vacuoles
• http://www.linkpublishing.com/video-transport.htm#Paramecium_-_Contractile_Vacuoles
• http://www5.pbrc.hawaii.edu/allen/ch09/video/vid-1/
Algae
• Autotrophic protists• Some mixotrophs• Important in food
chains in aquatic habitats
• Includes– Phytoplankton– Seaweeds
Euglena
Protozoans
• Ingestive heterotrophs
• Mostly unicellular
• Planktonic or sessile
• Free-living or parasites
Fungal-like Protists
• Resemble fungi during life cycle
• Make spores• More closely
related to amoeboids than fungi
• Photo Credit: Dr. Tom Volk, http://botit.botany.wisc.edu/toms_fungi/oct2003.html