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File C

  1. 1. 12 The Eukaryotes: Fungi, Algae, Protozoa, and Helminths
  2. 2. The Protozoa Table 12.1
  3. 3. Protozoa <ul><li>Eukaryotic </li></ul><ul><li>Unicellular </li></ul><ul><li>Chemoheterotrophs </li></ul><ul><li>Vegetative form is a trophozoite. </li></ul><ul><li>Asexual reproduction is by fission, budding, or schizogony. </li></ul><ul><li>Sexual reproduction by conjugation. </li></ul><ul><li>Some produce cysts. </li></ul>Figure 12.16
  4. 4. Archaezoa <ul><li>No mitochondria </li></ul><ul><li>Multiple flagella </li></ul><ul><li>Giardia lamblia </li></ul><ul><li>Trichomonas vaginalis (no cyst stage) </li></ul>Figure 12.17b–d
  5. 5. Microspora <ul><li>No mitochondria </li></ul><ul><li>Nonmotile </li></ul><ul><li>Intracellular parasites </li></ul><ul><li>Nosema </li></ul>
  6. 6. Amoebozoa <ul><li>Move by pseudopods </li></ul><ul><li>Entamoeba </li></ul><ul><li>Acanthamoeba </li></ul>Figure 12.18a
  7. 7. Apicomplexa <ul><li>Nonmotile </li></ul><ul><li>Intracellular parasites </li></ul><ul><li>Complex life cycles </li></ul><ul><li>Plasmodium </li></ul><ul><li>Babesia </li></ul><ul><li>Cryptosporidium </li></ul><ul><li>Cyclospora </li></ul>
  8. 8. Plasmodium 2 3 6 7 8 Figure 12.19
  9. 9. Cryptosporidium Figure 25.19
  10. 10. Ciliophora (Ciliates) <ul><li>Move by cilia </li></ul><ul><li>Complex cells </li></ul><ul><li>Balantidium coli is the only human parasite. </li></ul>Figure 12.20
  11. 11. Euglenozoa <ul><li>Move by flagella </li></ul><ul><li>Photoautotrophs </li></ul><ul><ul><li>Euglenoids </li></ul></ul><ul><li>Chemoheterotrophs </li></ul><ul><ul><li>Naegleria : Flagellated and amoeboid forms; causes meningoencephalitis. </li></ul></ul><ul><ul><li>Trypanosoma : Undulating membrane, transmitted by vectors. </li></ul></ul><ul><ul><li>Leishmania : Flagellated form in sand fly vector, ovoid form in vertebrate host. </li></ul></ul>
  12. 12. Euglenozoa Figure 12.21
  13. 13. Dinoflagellates <ul><li>Why are these studied with algae and protozoa? </li></ul>Figure 12.14
  14. 14. <ul><li>Cellular slime molds </li></ul><ul><ul><li>Resemble amoebas, ingest bacteria by phagocytosis. </li></ul></ul><ul><ul><li>Cells aggregate into stalked fruiting body. </li></ul></ul><ul><ul><li>Some cells become spores. </li></ul></ul><ul><li>Plasmodial slime molds </li></ul><ul><ul><li>Multinucleated large cells. </li></ul></ul><ul><ul><li>Cytoplasm separates into stalked sporangia. </li></ul></ul><ul><ul><li>Nuclei undergo meiosis and form uninucleate haploid spores. </li></ul></ul>Slime Molds
  15. 15. Cellular Slime Mold Figure 12.22
  16. 16. Plasmodial Slime Mold Figure 12.23 (1 of 2)
  17. 17. Slime Molds <ul><li>Why are slime molds included with the Amoebozoa? </li></ul>Figure 12.23 (2 of 2)

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