Homework
• Summarizing concepts 3 and 4 pg. 521
Character Ed
Objectives
• Distinguish plant-like protists.
• Describe how protists affect humans.
Protists!
Chapter 26
Plant-Like Protists
• Plant-like protists are known as algae
• Autotrophic
• Have chloroplasts for photosynthesis
• Share several features
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Have photosynthetic pigment chlorophyll a
Aquatic
Flagella
Pyrenoids – storing starch and photosynthesis
Algae
• Four basic body forms
1. Unicellular – free-living aquatic, live together
as phytoplankton
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Form the base for nearly all marine and
freshwater food chains
2. Colonial – individual cells acting in a
coordinated manner, Volvox
Algae
3. Filamentous – multicellular, slender and rod
shaped and are composed of cells that are
joined end to end, Spirogyra
4. Multicellular – kelp and seaweed
Plant-like Protists
• Green Algae
• Brown Algae
• Red Algae
• Diatoms – have cell walls, shells
• Dinoflagellates – bioluminescence, red tide
• Golden algae
• Eugleniods – both plant-like and animal-like, Euglena
Fungi-like Protists
• Slime molds and Water molds
• Stationary reproductive phase in which they
use spore-bearing structure called a fruiting
body
Slime Molds
• Found on moist, decaying matter
• White, yellow, or red masses of slime
Water Molds
• Composed of branching filaments of cells
• Found mainly in bodies of fresh water
Protists and Humans
Protists and Humans
• The produce large amounts of oxygen
• Autotrophs – produces
• Symbiotic relationship with coral – give them
their color and carbon supply
Industry
• Food – seaweed, sushi
• Byproducts –
• Alginate – cosmetics, various drugs, stabilize ice
cream
• Carrageenan
• Agar – petri dishes
Health
• Can also cause diseases
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Malaria
Sleeping Sickness
Giardiasis
Trichomoniasis