Kingdom Protista

1
Kingdom Protista

• Chapter 20
• Diversity is the Key

2
What is a protist?

• Unicellular
• Eukaryotic
• Classified into 3 general categories
• Animal like
• Plant like
• Fungus like
• Based on mode of metabolism

3
Animal Like Protists

• Classified by movement
• Zooflagellates
• Sarcodines
• Ciliates
• Sporozoans

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Zoomastigina

• Euglena, Trypanasoma
• Flagellates move by using a whip like tail
• Have red pigmented eyespot for detecting light

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Sarcodina

• Amoeba proteus
• Move and eat using psuedopods
• Flexible and active
• Fresh and Salt Water

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Ciliophora

• Paramecium/Vorticella
• Move by using cilia
• Macronucleus-day to day
• Micronucleus-chromosomes and DNA
• Stentor to the right?
• Fresh and Salt Water
• Contractile Vacuoles to remove water

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Sporozoa

• Plasmodium
• Reproduce using spores
• Parasites, carried by insects
• Plasmodium causes malaria

8
Plant Like Protists

• Classified by color
• Diatoms
• Dinoflagellates
• Red Algea
• Brown Algea
• Green Algea

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Bacillariophyta

• Diatoms
• Contain carotenoids for their gold pigments
• Have geometric shells that are cell walls made of
  silica
• Marine and Freshwater
• Many Uses (glass,toothpaste, soil component)

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Pyrrophyta

• Dinoflagellates
• Double flagella
• Can secrete toxins in Red Tide (found in
  shellfish)
• Not all toxic, give off light

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Rhodophyta

• Red Algae
• Absorbs blue wavelengths of light allowing them
  to live deeper in the water column
• Helps build coral reefs

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Phaeophyta

• Brown algae/Kelp
• Largest of the algae
• Can grow up to 60 m
• Closely related to land plants in structure
• Mostly marine

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Giant Kelp
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Chlorophyta

• Volvox, Ulva
• Most numerous of all plantlike protists
• Fresh and marine water, green algae
• Most attach to rocks
• Ulva shown to the right?

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Fungus Like Protists

• Classified by reproduction
• Cellular Slime Molds
• Acellular Slime Molds
• Water Molds

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Acrasiomycota

• Cellular Slime Molds
• Move like amoeba
• Reproduce with spores from fruiting body and
  undergo cell division?
• When food runs out, spores are released

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Myxomycota

• Plasmodial Slime Molds
• Considered a giant bag of cytoplasm with many
  nuclei
• Reproduce by spores from sporangia
• Extend vein like structures to absorb decaying
  food
• Can grow several meters

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Oomycota

• Water molds and downy mildews
• Saprophytic or Parasitic
• Thrive on detritus in the water
• Make hyphae or thin filaments ?
• Alternate b/t sexual and asexual reproduction