1 / 37

Kingdom Protista Animal-like Protists

Kingdom Protista Animal-like Protists. Introduction. Protozoa (the animal-like protists) are the most abundant organisms in the world in terms of numbers and biomass Protozoa are also called zooplanton. Introduction. Their principle importance is as consumers of bacteria

brit
Télécharger la présentation

Kingdom Protista Animal-like 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. Kingdom ProtistaAnimal-like Protists

  2. Introduction • Protozoa (the animal-like protists) are the most abundant organisms in the world in terms of numbers and biomass • Protozoa are also called zooplanton

  3. Introduction • Their principle importance is as consumers of bacteria • They are also often sources of food. For example, baleen whales live on nothing but small protists (zooplankton and phytoplankton)

  4. Introduction • They are also important as parasites and symbionts of multicellular animals

  5. Introduction • They are defined as single-celled, aquatic, eukaryotic organisms that exhibit diverse motility mechanisms

  6. Introduction • Protozoa may be heterotrophic or autotrophic

  7. Phylum Sarcodina • Example: Amoeba

  8. Sarcodina: Characteristics • Blobby shape • Cytoplasm has ectoplasm & endoplasm • Pseudopodia • Change shape all the time • Contractile vacuole

  9. Sarcodina: Movement • Cytoplasmic streaming • Pseudopodia

  10. Sarcodina: Nutrition/Food • Heterotrophic • Eat Bacteria, organic debris, other protists

  11. Sarcodina: Response/Senstivity • Move away from light— Called an avoidance reaction (They will dehydrate quickly if they stay in light)

  12. Sarcodina: Reproduction • Divide asexually by mitosis

  13. Sarcodina: Environment/Economic Importance • Recyclers • 1st or 2nd consumer in the aquatic food chains • Cause disease (dysentery) • Eat bacteria

  14. Sarcodina: Diagram

  15. Phylum: Zoomastogina Examples: Leishmania Trichomonas

  16. Phylum: Zoomastogina • Movement: 1 to 4 whip-like flagella • Nutrition/Feeding: Bacteria; other protists; organic debris

  17. Phylum: Zoomastogina • Response/Sensitivity: None Known • Reproduction/Life Cycle: Asexual by mitosis

  18. Phylum: Zoomastogina Environmental/Economic Importance: • Many are disease-causing

  19. Phylum: Zoomastogina Diagram

  20. Phylum Ciliophora • Examples: Paramecium

  21. Ciliophora: Unique Characteristics • Cilia all over or in distinct regions • 2 nuclei • Contractile vacuole to control water balance Paramecium Humor

  22. Ciliophora: Movement • Rhythmic beating of cilia causes somersaults or rotating motions

  23. Ciliophora: Nutrition/Food • All heterotrophic • Eat Bacteria, organic debris, other protists • Cilia sweep food particles into oral groove; food enters mouth pore and makes a food vacuole

  24. Ciliophora: Response/Sensitivity • Avoidance Reaction • respond to light, chemicals, and/or temperature changes • Trichocysts for defense—harpoon-like for stinging

  25. Ciliophora: Reproduction/Life Cycle • Asexual by mitosis • Sexual—recombination of DNA by conjugation (see details in your book)

  26. Ciliophora: Environmental/ Economic Importance • Recyclers of nutrients • Cleaners • 1st or 2nd consumers in aquatic food chains

  27. Ciliophora: Diagram

  28. Phylum: Sporozoa • Examples: Plasmodium (causes malaria)

  29. Sporozoa: Unique Characteristics • All parasitic • All disease-causing

  30. Sporozoa: Movement • None • “Go with the flow” • Move with blood or saliva of host organism

  31. Sporozoa: Nutrition/Food • Feed on blood of Host • Heterotrophic

  32. Sporozoa: Response/Sensitivity • None—nothing needed since it is parasitic and is always inside of a host organism.

  33. Sporozoa: Reproduction/Life Cycle • Complex Life cycle involving 2 or more hosts • 2 part life cycle • 1 part sexual • 1 part asexual

  34. Sporozoa: Environmental/ Economic Importance • Diseases are expensive to cure and prevent • “Idol Gives Back” buys mosquito netting to help poor areas where malaria exists

  35. Sporozoa-Diagram • No diagram because they are too small to see in detail, even with an electron microscope • Instead, be familiar with the life cycle (see diagram in your note sheet; use your book or last slide to fill in blanks)

  36. Sporozoa Here is a picture of malaria infected blood cells.

  37. Sporozoa--life cycle of Plasmodium, the causative agent of malaria

More Related