The Kingdom of Protists

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The Kingdom of Protists
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The Kingdom of Protists

• Eukaryotic (one celled with a nucleus)
• They come in three groups
• Plant-like
• Animal-like
• Fungus-like
• Classified by how they get their food.

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Fungus-like Protists

• Gets its food from dead organic matter or from a
  living organism
• Slime molds
• Live in cool, moist and shady areas
• Can be found singular or in masses
• Eat bacteria, yeast, and small bits of decaying
  plant and animal matter
• Develop stalks with rounded knobs which will
  release spores that will develop into new slime
  mold if the conditions are right

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Fungus-like Protists

• Water molds
• Are small and single celled
• Live in water or moist soil
• Some are decomposers while others are parasites
• Parasitic water molds use plants, animals, fungi,
  or algae as hosts
• Some Parasitic water molds cause diseases such as
  late bight which caused the potato famine in
  Ireland.

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Protists
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Plant-like Protists Algae

• Algae have chlorophyll and are producers
• Algae live in water
• Some are multicellular such as kelp and seaweed
• Phytoplankton are producers and are a vast
  majority of the food chain and produce most of
  the worlds oxygen

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Plant-like Protists Algae

• Red algae has chlorophyll and red pigment which
  helps them to absorb light (red sea)
• Brown algae often form large floating beds and
  are often found in colder climates
• Green algae are the most diverse group and are
  found in water, moist soil, in melting snow, on
  tree trunks, and even inside other organisms

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Plant-like Protists Algae

• Diatoms
• Single celled
• Found in salt and fresh water
• Make up the majority of phytoplankton
• Have glass-like shells that are used in
  toothpaste, polishes, filters, and insulation

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Plant-like Protists Algae

• Dinoflagellates
• Found in salt water
• Most are producers
• Some are red and produce a strong poison (red
  tide)

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Plant-like Protists Algae

• Mainly found in fresh water
• Usually plant-like and animal like

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Protists
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Animal-like Protists Protozoa

• Single-celled
• Consumers
• Some are parasites
• Can move on their own
• Divided into four groups

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Animal-like Protists Protozoa

• Amoebalike Protists
• Soft, jelly-like protozoan
• Found in both fresh and salt water, in soil, or
  as parasites in animals
• Move using pseudopodia (false foot)
• Method of eating, engulfing food and then
  reversing the process to expel wastes
• Some protozoa have shells

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Animal-like Protists Protozoa

• Flagellates
• Use flagella to move
• Some live in water
• Others are parasites that can cause disease
• Some live in symbiosis with another organism

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Animal-like Protists Protozoa

• Ciliates
• The most complex protozoa
• Have cilia to move and for feeding

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Animal-like Protists Protozoa

• Spore-forming
• Parasites that absorb nutrients form their hosts
• Cannot move on their own
• Complicated life cycles that usually involve more
  than one host

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Reproduction of Protists

• Some reproduce asexually by fission
• Some reproduce sexually by conjugation
• Many reproduce both asexually and sexually
  alternating from one generation to the next

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