Kingdom Protista

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Kingdom Protista

• Unicellular plants and animals

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General Information

• Protista, from the Greek protistos first
• Diverse group
• Aka Algae Protozoa
• Most are Unicellular
• exception Volvox is colonial

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Characteristics

• Eukaryotic
• (have a nucleus)

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Characteristics

• Many feeding patterns
• some plant-like,
• some animal-like,
• some saprophytes
• (absorb food like fungi do)
• some parasites
• (pathogens)

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3. Habitats

• Almost anywhere there is water

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4. Reproduction

• Alternation of Generations
• ? switch btwn. asexual repro. (spores)
• sexual repro. (gametes) back again

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5. Multicellularity

• Cells specialized for f(x)s
• Division of labor
• E.g. holdfast cell, gamete-forming cells

Holdfast cell
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6. Classification by Exclusion

• ? If organism doesnt belong in any other phylum,
  put it in this one!
• I.e. Weirdos go in this group!

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7. Protist Groups

• Pseudopodia for locomotion
• false feet
• Animal-like, parasites
• AMOEBAS
• E.g. ?Amoeba
• E.g. Entamoeba histolytica
• (amoebic dysentary)

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8. Protist Groups

• b. Foraminifera
• Source of CaCo3
• (calcium carbonate / chalk)
• E.g. The
• white cliffs
• of Dover

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8. Protist Groups

• c. Diatoms
• Photosynthetic, unicellular, double shells
• of SiO3(glass)

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8. Protist Groups

• d. Green Algae
• plant-like protists
• E.g. ?Volvox, endosymbionts of jellyfish

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8. Protist Groups

• e. Red Algae

Source of agar (growth medium for bacteria)
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8. Protist Groups

• f. Brown Algae
• E.g.
• kelp

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8. Protist Groups

• Protists with Flagella (animal-like)
• g. Dinoflagellates
• E.g. Gonyaulux
• Capable of bioluminescence
• (glowing in the dark)
• the red tide
• makes scallops
• toxic to humans

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Red (Crimson) Tide
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8. Protist Groups
?Causes giardia / backpackers disease
?Trichonympha in termites digest wood
(cellulose)
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8. Protist Groups

• h. Euglenoids e.g. ?Euglena
• ?use flagella to move

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8. Protist Groups

• i. Cilia for locomotion -Ciliates)
• ?Paramecium

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8. Protist Groups

• j. Slime Molds
• Cellular
• Acellular

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8. Protist Groups

• k. Water Molds
• E.g. potato blight
• Caused potato famine
• in Ireland
• 1845-1847
• 400,000 starved

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8. Protist Groups

• l. ?Sporozoans
• Cannot move themselves
• Move via vectors

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l. ?Sporozoans

• EXAMPLES
• E.g. Plasmodium (causes malaria)
• vector Anopheles mosquito
• E.g. Toxoplasmolysis (from cat feces
• causes fetal death)
• E.g. African sleeping sickness
• vector tsetse fly