Unit 6: Microorganisms and Fungi Chapter 20: Protists.
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Transcript of Unit 6: Microorganisms and Fungi Chapter 20: Protists.
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Unit 6: Microorganisms and Fungi
Chapter 20: Protists
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Key Concepts:
What are protists? What are the types of animal-like
protists? What are the types of plant-like
protists? What are the types of fungus-like
protists?
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A. The Kingdom Protista
1. Protists - any organism that is Eukaryotic; but not a plant, animal, or fungi.
2. Protists can be unicellular, multicellular, or colonial.
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3. Protists are either: a) heterotrophic (animal-like)b) autotrophic (plant-like)c) decomposers/parasites (fungus-like)
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B. Animal-Like Protists
1. Phylum Zooflagellates – a) Move using a flagella (whip-like tail)b) Can have one or two flagellac) Most reproduce asexuallyd) Absorb food through their cell-
membranes
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2. Phylum Sarcodina – (sarodines)a) Move by pseudopodia (false feet)b) Usually live in waterc) Captures food by wrapping the
pseudopodium around it and ingesting it.
d) Example: Amoeba
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3. Phylum Ciliophora (ciliates)a) Use cilia for feeding and movementb) Found in fresh and salt waterc) Free-living – don’t exist as parasitesd) Example: Paramecium
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4. Phylum Sporozoaa) All members of this phyla are
PARASITESb) Life cycles involve more than one hostc) Examples: The Plasmodium
sporozoan causes malaria and is carried by the female Anopheles mosquito
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Section 20-2
Figure 20-7 The Life Cycle of Plasmodium
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C. Plant-Like Protists
1. Phylum Euglenophyta (euglenophytes)a) Move by 2 flagellasb) Have no cell wallc) Reproduce asexuallyd) Performs photosynthesis (make’s it’s own
food)e) Example: Euglena
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2. Phylum Chrisophyta (chyrsophytes):a) Gold-colored chlorophyllb) Includes yellow-green algae and golden-
brown algae
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3. Phylum Bacillariophyta (Diatoms)a) Produce thin, delicate cell walls rich is
silicon – the main component of glassb) Sexually reproduce and asexually
reproduce.
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4. Phylum Pyrrophyta (dioflagellates)a) ½ are photosyntheticb) ½ are heterotrophicc) Have 2-flagellad) Reproduce asexuallye) Cause of red Tides
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5. Phylum Rhodophyta: (red Algae)
a) Lives in deep water
b) Contains chlorophyll A
c) Multicellulard) Helps form coral
reefs
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6. Phylum Phaeophyta (Brown Algae)
a) Marine organismsb) Live in shallow
waterc) Most complex
algaed) Contains
Chlorophyll A and C
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6. Phylum Chlorophyta: (green algae)
a) Cell wallb) Chlorophyll A
and Bc) Found in fresh
and marine water
d) Single celled, multi celled, and colonial.
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C. Fungus – Like Protists
1. Phylum Acrasiomycota (cellular slime molds)
a) Free-living cellsb) Absorb nutrients
from dead/decaying matter
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2. Phylum Myxomycota (acellular slime molds)
a) Single cell with many nuclei
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3. Phylum Oomcota (water Mold)
a) Feed on dead or decaying matter,
b) Both sexual and asexual reproduction
c) Caused the Potato Famine of Ireland in 1846