kingdom protista the catch all kingdom protozoans
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Kingdom Protista “ The Catch-All Kingdom” Protozoans

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Kingdom Protista “ The Catch-All Kingdom” Protozoans. Characteristics. Single celled Microscopic Move independently – named for mechanism of movement 65,000 species Most heterotrophic Free-living or parasitic All capable of asexual reproduction through binary or multiple fission

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characteristics
Characteristics
  • Single celled
  • Microscopic
  • Move independently – named for mechanism of movement
  • 65,000 species
  • Most heterotrophic
  • Free-living or parasitic
  • All capable of asexual reproduction through binary or multiple fission
  • Some reproduce sexually through conjugation
asexual reproduction
Asexual reproduction
  • Binary
  • fission
schizogony
Schizogony
  • Asexual reproduction in multiple fission, as in Malaria
classification
Classification
  • Currently based on HOW they MOVE
  • Reviewing this by looking at phylogeny
4 phyla of protozoans
4 Phyla of Protozoans
  • Sarcodina
  • Ciliophora
  • Zoomastigina
  • Sporozoa
adaptations
Adaptations
  • Physiological mechanisms, like eyespots
  • Form cysts
  • Multiple nuclei
evolution of protista
Evolution of Protista
  • Prokaryotes – 3.5 billion years ago
  • Eukaryotes – 1.5 billion years ago
  • Protozoan thought to be descendents of first eukaryotes
  • Endosymbiotic Theory
sarcodina
Sarcodina
  • 40,000 species
  • Amoebas
  • Pseudopodia – most move
  • Cytoplasmic streaming
  • Eat other protists
  • Ecological roles:

forams – tests made from caco3 – sink to bottom and make limestone and chalk deposits

Radiolaria – t4ests made form sio2

  • Cause diseases like amebic dysentary
phylum ciliophora
Phylum Ciliophora
  • 8,000 species
  • Move using cilia
  • Pellicle, oral groove, gullet, macronucleus, micronucleus
  • Paramecium
phylum zoomastigina
Phylum Zoomastigina
  • 2,500 species
  • Move using flagella
  • Most free-living
  • Cause disease – zooflagellates
  • African trypanosomiasis – sleeping sickness – tsetse fly
  • Chagas Disease – kissing bug
  • Leishmaniasis – sand fly
  • giardiasis
phylum sporozoa
Phylum Sporozoa
  • 6,000 species
  • Carried in blood
  • Cause disease like toxoplasmosis and malaria
  • Know malaria cycle!!!!
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