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Kingdom Protista “ The Catch-All Kingdom” Protozoans

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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Kingdom Protista “ The Catch-All Kingdom” Protozoans

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  1. Kingdom Protista“ The Catch-All Kingdom” Protozoans

  2. 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

  3. Sexual reproduction

  4. Asexual reproduction • Binary • fission

  5. Schizogony • Asexual reproduction in multiple fission, as in Malaria

  6. Classification • Currently based on HOW they MOVE • Reviewing this by looking at phylogeny

  7. 4 Phyla of Protozoans • Sarcodina • Ciliophora • Zoomastigina • Sporozoa

  8. Adaptations • Physiological mechanisms, like eyespots • Form cysts • Multiple nuclei

  9. 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

  10. Endosymbiotic Theory

  11. Phylums…

  12. 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

  13. Phylum Ciliophora • 8,000 species • Move using cilia • Pellicle, oral groove, gullet, macronucleus, micronucleus • Paramecium

  14. 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

  15. The tsetse fly – sleeping sickness vector

  16. The Kissing Bug

  17. Leishmaniasis

  18. Phylum Sporozoa • 6,000 species • Carried in blood • Cause disease like toxoplasmosis and malaria • Know malaria cycle!!!!

  19. The end for now….

  20. This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.

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