1 review give three examples of photosynthetic protists predict how would ocean food chains change...
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21.3 The Ecology of Protists Ch 21 Protists and Fungi 21.3 The Ecology of ProtistsTRANSCRIPT
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1 Review Give three examples of photosynthetic protists
Predict How would ocean food chains change in the absence of photosynthetic protists
2 Explain By what two methods do parasitic protists primarily spread disease
Form an Opinion Why are protist caused disease more widespread in tropical areas of the world.
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CH 21 PROTISTS AND FUNGI21.3 The Ecology of Protists
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Autotrophic Protists
Phytoplankton Red and brown algae Euglena Dinoflagellates.
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Base of many aquatic food chains Half of Earth’s photosynthesis is carried out by
phytoplankton Phytoplankton feeds both shrimp and some
whales.
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Provide coral reefs with energy and also calcium carbonate
Brown kelp can grow up to 60 meters Can create “algae blooms”
Red tide.
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Heterotrophic Protists
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Amoebas
Surround a cell or particle and take it inside themselves to form a food vacuole
Food vacuole Small cavity in the cytoplasm that temporarily stores
food Materials are digested and nutrients removed Wastes stay in and food vacuole brings to edge of cell.
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Ciliates
Use cilia to sweep food particles into gullet Gullet
Indentation in one side of the organism Particles are forced into food vacuoles that form at
base.
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Food vacuoles pinch off into cytoplasm and fuse with lysosomes
Waste materials are emptied when the food vacuole fuses with the anal pore.
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Slime Molds
Key roles in recycling nutrients in an ecosystem Uses decaying organic material.
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Slime Molds
Amoeba like cells.
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Forms together into a large structure known as a plasmodium.
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Plasmodium develops sporangia Meiosis produces haploid spores to continue the
cycle inside.
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Mutualistic Protists
Trichonympha and termites.
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Parasites and Disease
Debilitating intestinal diseases, African sleeping sickness, and malaria.
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Intestinal Diseases
Giardia Diarrhea causing found in streams
Amebic dysentery Cryptosporidium
Chlorine resistant, found in city water African Sleeping Sickness
Trypanosoma carried by Tsetse fly.
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Malaria
Plasmodium carried by Anopheles mosquito.
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