1. 4/14/15 Objective: How are protists classified? Do Now: What do you put/find in a junk drawer?

2. What’s in a junk drawer? Kingdom Protista is very diverse and where scientists place eukaryotes that are not animals, plants, or fungus.

3. Basic Characteristics of Protists Have eukaryotic cells (has a nucleus and organelles) Most are unicellular, algae is multicellular Very diverse kingdom

4. Protist Complexity The protist’s one cell must carry out many processes, so considered to be the most complex of eukaryotic cells

5. Protists are grouped by how they get nutrition 1. Animal-like protists (protozoans) - heterotrophs 2. Fungus-like protists are heterotrophs that decompose 3. Plant-like protists (algae) are autotrophs

6. Protozoans (Protozoa = “little animal”) 1. Heterotrophs 2. Can move like most animals Different because they are unicellular Animal-like protists, resemble animals in 2 ways

7. 1. Protozoans With Flagella Zooflagellates: Move by flagella Reproduce asexually by binary fission

8. Specific Zooflagelletes 1. Trichonympha: live in the gut of termites, enzymes digest cellulose in wood 2. Trypanosoma: parasitic, causes African Sleeping sickness spread by tsetse fly 3. Giardia: parasitic, lives in intestines, found in contaminated drinking water

9. 2. Protozoans With Pseudopodia Protozoans that move by extending lobes of cytoplasm

10. Pseudopod Pseudopod: Extensions of cytoplasm Pseudopod = “false foot” http://www.youtube.com/watch?v=7pR7TN zJ_pA Ex: Amoeba

11. 3. Protozoans With Cilia Ciliates: Found free-living in freshwater envts. Short hair-like projections called cilia to move and feed

12. 3. Protozoans With Cilia Paramecium : A ciliate with many rows of cilia for movement http://www.youtube.com/watch?v=fmwN_m D7TvY

13. Paramecium

14. 3. Protozoans With Cilia Some ciliates have just clusters of cilia in tufts like Stentor who uses its cilia “tuft” to capture food http://www.youtube.com/watch?v=pds8w7 C9FEw

15. 4. Protozoans Lacking Motility (Apicomplexans) Spore-forming parasites (Sporozoans) No structure for movement, need host to reproduce Spore = reproductive cell

16. 4. Protozoans Lacking Motility (Apicomplexans) Plasmodium The organism that causes malaria in humans, spread by infected mosquitoes http://www.youtube.com/watch?v=JwsoK8 O0lXE&list=PL0BFC02A301F673F3&index =3&feature=plpp_video http://www.youtube.com/watch?v=RxZ7pd KqwZw&feature=bf_next&list=PL0BFC02A 301F673F3&lf=plpp_video http://www.youtube.com/watch?v=4aVUrG O97Zg&feature=bf_next&list=PL0BFC02A 301F673F3&lf=plpp_video http://www.youtube.com/watch?v=DPv0Vst forY\