Protists

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Chapter 18

• Protists

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Kingdom Protista

• Protists are single-celled, eukaryotic organisms.
• They may be solitary or colonial
• Not all scientists agree on how to classify
  protists.
• Some are similar to animals and some others are
  similar to plants.

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Evolution of Protists

• It is believed that protists evolved from a
  symbiotic relationship between prokaryotic cells.
• This theory is called the Endosymbiont
  Hypoythesis.

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Anamallike Protists

• There are some protists that behave similar to
  animals.
• There are four phyla that are anamillike. They
  are Ciliophora, Zoomastigina, Sporozoa, and
  Sarcodina.
• The main characteristic that differs among these
  phyla is their method of travel.

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