1 / 23

PROTISTS

PROTISTS. Protists. Eukaryotes, not members of the kingdoms Plantae , Animalia , or Fungi Most unicellular but not all Protista = very first. Evolution of Protists. Symbiosis of several cells Mitochondria/chloroplasts live inside larger cells. Classification of Protists.

lori
Download Presentation

PROTISTS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. PROTISTS

  2. Protists • Eukaryotes, not members of the kingdoms Plantae, Animalia, or Fungi • Most unicellular but not all • Protista= very first

  3. Evolution of Protists • Symbiosis of several cells • Mitochondria/chloroplasts live inside larger cells

  4. Classification of Protists • Animal-like protists-obtain food like heterotrophs • Plant-like protists- obtain food like autotrophs • Fungus-like protists- decomposers or parasites

  5. Phylums of Animal Like Protists • Zooflagellates • Movement: use flagellum to move • Food: Absorb food through cell membrane • Reproduction: asexually/sexually

  6. Sarcodines • Movement: pseudopods Amoeboid movement- cytoplasm streams into pseudopod • Food: pseudopods capture take into food vacuole • Reproduce: Mitosis/Cytokinesis

  7. Foraminiferans- Sarcodine Secretes calcium carbonate

  8. Ciliates • Movement: cilia propel • Food: Cilia move food into gullet, force food into food vacuole • Waste material emptied when food vacuole fuses with anal pore • Contractile vacuoles- cavities specialized to collect water • Ciliates= Paramecium

  9. Trichocysts- small bottle shaped structures used for defense Danger= stiff projections that protect cell • Two nuclei • Macronucleus- keeps genes for day to day use • Micronucleus- contains reserve copy of cells genes

  10. Reproduction: asexually mitosis/cytokinesis • Conjugation- exchange genetic material

  11. Sporozoans • Movement: not on their own/ parasitic • Reproduction: sporozoites • Diseases: malaria

  12. Plantlike Protists • Algae • 7 major phylums • 4- unicellular • 3- multicellular • Use photosynthesis- • Chlorophyll a • Chlorophyll b • Chlorophyll c • Accessory pigments • Allow use of different light wavelengths

  13. Unicellular Plant like Protists

  14. Euglenophytes aka Euglena • Movement: Two flagellum • Pellicle- cell membrane • Food: Eye spot- cluster of reddish pigment for photosynthesis Can live as heterotrophs-absorb food • Reproduce: Asexually- binary fission

  15. Chrysophytes • Yellow/green algae and gold/brown algae • Have gold colored chloroplasts

  16. Diatoms • Produce thin, delicate call walls rich in silicon (component of glass) • Cell walls – different patterns like etched glass

  17. Dinoflagellates • ½ photosynthetic ½ heterotrophic • 2 flagellum • Luminescent- shimmer when agitated

  18. Ecology of unicellular Algae • Make up the base of aquatic food chains • Phytoplankton- ½ of photosynthesis on earth

  19. Red Tide • Protistsrelease dangerous toxins • Shell fish eat the protists=trap toxin • Human eating shell fish become very sick • Paralysis • death

  20. Multicellular Plant like Protists 1. Red algae- coral reefs 2. Brown algae- Kelp 3. Green algae • Unicellular • Colonial (volvox) • Multicellular (ulva)

  21. Spirogyra- Green colonial algae • Live in water • Multicellular • Spiral shaped chloroplasts

  22. Fungus like Protists • Heterotrophs/decomposers • Slime molds or water molds • Water molds responsible for the Irish Great Potato Famine

More Related