1 / 58

Protists

Protists. The world of Protists: Animal-like Protists Plant-like Protists Fungus-like Protists. Protist Diversity. 200,000 species come in different shapes, sizes, and colors All are eukaryotes – have a nucleus and membrane-bound organelles Reproduce sexually or asexually. Protozoans.

zilya
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 The world of Protists: Animal-like Protists Plant-like Protists Fungus-like Protists

  2. Protist Diversity • 200,000 species come in different shapes, sizes, and colors • All are eukaryotes – have a nucleus and membrane-bound organelles • Reproduce sexually or asexually

  3. Protozoans Animal-like Protists

  4. Protozoans • Unicellular – made up of one cell • Heterotrophs– they eat other organisms or dead organic matter • Classified by how they move

  5. Phyla of Protozoans Amoebas Flagellates Ciliates Sporazoans

  6. Amoebas: the blobs • No cell wall • Move using pseudopods – plasma extensions or “fake feet” • Engulf bits of food by flowing around and over them

  7. Flagellates: the motorboats • Use a flagella – a whip like tailto move • Some cause diseases

  8. Trichomonas foetus : cow disease

  9. Trichomonas vaginalis: an STD

  10. Ciliates: the hairy ones • Move with cilia – tiny beating hairs

  11. Sporazoans: the parasite • Non-motile - Do not move • Live inside a host • One type causes malaria

  12. Malaria in red blood cells

  13. Pneumonia in aids patients

  14. Algae Plantlike Protists

  15. What are Algae? • Multicellular (Colony only)– made of more than one cell • Photosynthetic – make their own food • No roots, stems, or leaves • Each has chlorophylland other photosynthetic pigments

  16. Phyla of Algae Euglenoids Diatoms Dinoflagellates Red, Brown, & Green Algae

  17. Euglenoids: The Survivors • Aquatic • Move around like animals • Can ingest food from surroundings when light is not available

  18. Diatoms: The Golden Ones • Have shells made of silica (glass) • Photosynthetic pigment called carotenoids – give them a golden color

  19. Dinoflagellates: The Spinning Ones • Spin around using two flagella • Responsible for Red Tides • Create toxins that can kill animals and sometimes people

  20. Red Algae: The…uh…Red Ones (duh) • Seaweeds • Multicellular, marine organisms • Have red and blue pigments

  21. Brown Algae: The Brown Ones (You think?) • They have air bladders to help them float at the surface – where the light is.

  22. Green Algae: Yeah, You Guessed it, The Green Ones • Most live in fresh water • Can be unicellular or multicellular • Live alone or in groups called colonies

  23. Fungus-like Protists

  24. Characteristics in Common • All form delicate, netlike structures on the surface of their food source, mold-like • Obtain energy by decomposing organic material

  25. PhylaofFungus-like Protists Plasmodium Slime Molds Cellular Slime Molds Water Molds & Downy Mildews

  26. Slime Molds • Live in cool moist, shady places where they grow on damp, organic matter

  27. Plasmodium Slime Molds • Form plasmodium: a mass of cytoplasm that contains many diploid nuclei but no cell walls or membranes – its feeding stage • Creeps by amoeboid movement – 2.5 cm/hour

  28. Plasmodium continued… • May reach more than a meter in diameter • Form reproductive structures when surroundings dry up • Spores are dispersed by the wind and grow into new plasmodium

More Related