20-1 20-1 The Kingdom Protista The Kingdom Protista A. A. What Is a Protist? What Is a Protist? -Any organism that is not a plant, -Any organism that is not a plant, animal, fungus, or a prokaryote animal, fungus, or a prokaryote -Catch All Kingdom–mostly -Catch All Kingdom–mostly unicellular, eukaryotes unicellular, eukaryotes Euplotes Radiolarian Spirogyra
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20-1The Kingdom Protista A. What Is a Protist? -Any organism that is not a plant, animal, fungus, or a prokaryote -Any organism that is not a plant, animal,
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20-120-1 The Kingdom ProtistaThe Kingdom ProtistaA.A. What Is a Protist?What Is a Protist?
-Any organism that is not a plant, animal, fungus, -Any organism that is not a plant, animal, fungus, or a prokaryoteor a prokaryote
-Catch All Kingdom–mostly unicellular, eukaryotes-Catch All Kingdom–mostly unicellular, eukaryotes
Euplotes
Radiolarian
Spirogyra
B. Evolution of protistsB. Evolution of protists
-First eukaryotic organisms on earth-First eukaryotic organisms on earth
C. Classification of ProtistsC. Classification of Protists
-Based on how they obtain nutrients and -Based on how they obtain nutrients and how they movehow they move
1)1) Zooflagellates:Zooflagellates: FlagellaFlagella Usually in aquatic environmentUsually in aquatic environment Asexual and sexual reproductionAsexual and sexual reproduction
2) Sarcodines2) Sarcodines Pseudopods (move using cytoplasmic Pseudopods (move using cytoplasmic
projections)projections) Amoeboid movementAmoeboid movement Shells of calcium carbonate or silicaShells of calcium carbonate or silica
Amoeba
AmoebaAmoeba
Contractile vacuole
Nucleus
Food vacuole
Pseudopods
3) Ciliates3) Ciliates Use cilia to swim, free-movingUse cilia to swim, free-moving Internal anatomy: macro- and micronucleus, Internal anatomy: macro- and micronucleus,
recycle wastesrecycle wastes if they die they can deprive Oif they die they can deprive O22 from the water from the water
20-4 Plantlike Protists:20-4 Plantlike Protists:Red, Brown, and Green AlgaeRed, Brown, and Green Algae
Red AlgaeRed Algae Chlorophyll a and phycobilins (blue light)Chlorophyll a and phycobilins (blue light) Can live deeper in waterCan live deeper in water MulticellularMulticellular
Brown AlgaeBrown Algae Chlorophyll a and c and fucoxanthinChlorophyll a and c and fucoxanthin MulticellularMulticellular LargestLargest
Fucus
Sargassum
Green AlgaeGreen Algae Chlorophyll a and bChlorophyll a and b Cellulose in cell wallsCellulose in cell walls Probably ancestors of modern land plantsProbably ancestors of modern land plants Unicellular and multicellularUnicellular and multicellular
Volvox
Unicellular Green AlgaeUnicellular Green Algae Contractile vacuolesContractile vacuoles ChlamydomonasChlamydomonas