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
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.
CH 21 PROTISTS AND FUNGI21.3 The Ecology of Protists
Autotrophic Protists
Phytoplankton Red and brown algae Euglena Dinoflagellates.
Base of many aquatic food chains Half of Earth’s photosynthesis is carried out by
phytoplankton Phytoplankton feeds both shrimp and some
whales.
Provide coral reefs with energy and also calcium carbonate
Brown kelp can grow up to 60 meters Can create “algae blooms”
Red tide.
Heterotrophic Protists
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.
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.
Food vacuoles pinch off into cytoplasm and fuse with lysosomes
Waste materials are emptied when the food vacuole fuses with the anal pore.
Slime Molds
Key roles in recycling nutrients in an ecosystem Uses decaying organic material.
Slime Molds
Amoeba like cells.
Forms together into a large structure known as a plasmodium.
Plasmodium develops sporangia Meiosis produces haploid spores to continue the
cycle inside.
Mutualistic Protists
Trichonympha and termites.
Parasites and Disease
Debilitating intestinal diseases, African sleeping sickness, and malaria.
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.
Malaria
Plasmodium carried by Anopheles mosquito.