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Lab 2: Protists. Protists! Lab Goals Identify the three domains of life and the main characteristics of each Define protists and know why the group “Protista”

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Presentation on theme: "Lab 2: Protists. Protists! Lab Goals Identify the three domains of life and the main characteristics of each Define protists and know why the group “Protista”"— Presentation transcript:

1 Lab 2: Protists

2 Protists!

3 Lab Goals Identify the three domains of life and the main characteristics of each Define protists and know why the group “Protista” is not an appropriate taxon Be able to recognize the main supergroups, subgroups, and kingdoms of protists Practice microscope skills

4 5 Kingdoms or 6 Kingdoms? Separation based on rRNA sequences. Kingdom Monera is comprised of 2 separate monophyletic groups: 1.Eubacteria 2.Archaebacteria

5

6 Phylogenetic tree of Domain Eukarya (“Protista” in yellow) Why is Protista not a good kingdom?

7 Solution: Domain (Eukarya) Supergroup Subgroup Kingdom Phylum Etc.

8 Linnaeus 1735 2 kingdoms Haeckel 1866 3 kingdoms Chatton 1925 2 empires Copeland 1938 4 kingdoms Whittaker 1969 5 kingdoms Woese et al. 1977 6 kingdoms Woese et al. 1990 3 domains (not treated)Protista ProkaryotaMonera EubacteriaBacteria ArchaebacteriaArchaea Eukaryota Protista Eukarya VegetabiliaPlantae Fungi Plantae Animalia

9 The Prokaryotic Domains: Bacteria & Archaea Bacteria Domain  Contain Peptidoglycan in Cell Walls. Archaea Domain  Contain Histones associated with DNA.  Likely share more Recent Common Ancestor with Eukaryotes than with Bacteria.  Live EVERYWHERE!

10 Three Domains of Life Bacteria  No nucleus  Peptidoglycan in cell walls Archaea  No nucleus  Histones associated with DNA. Eukarya  Membrane-bound nucleus and organelles  Histones associated with DNA  Unicellular or Multicellular More closely related to each other than to Bacteria!

11 What is a protist? Protist=Eukaryote not classified as a plant, animal, or fungi – NOT a monophyletic group!

12 Why are protists important?

13 Disease – “Beaver Fever” (Giardia) – Red Tide – Malaria – Toxoplasmosis – African Sleeping Sickness

14 http://www.youtube.com/watch?v=Py- J1ZazHDM&feature=related http://www.youtube.com/watch?v=Py- J1ZazHDM&feature=related

15 MICROSCOPES! (Appendix B, p.213-218) Start at 4x or 10x See manual for preparing slides Save any really good slides for others – Will save everyone time Clean the slides when you are done

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