1. Protists

2. Characteristics live in water eukaryotic most are unicellular, some are multicellular (algae) some are autotrophic (can make own food); some are heterotrophic (cannot make own food)

3. Characteristics (cont.) all can reproduce asexually (by mitosis or binary fission); some are capable of sexual reproduction (by conjugation)

4. Characteristics (cont.) -some have cells with contractile vacuoles that help maintain homeostasis (can hold and expel fluid)

5. Can be … 1.animal-like (protozoa) – absorb or gather/capture food *flagellates – move by flagella examples: ones that live in termite’s intestine, ones that cause African sleeping sickness

6. More animal-like protists … sarcodines – uses pseudopods to move and capture prey example: amoeba http://micro.magnet.fsu.edu/moviegallery/pondscum/protozoa/amoeba/index.html

7. More animal-like protists … ciliates – move/eat by cilia, has oral groove and anal pore example: paramecium http://micro.magnet.fsu.edu/movieg allery/pondscum/protozoa/parameci um/index.html

8. Still more animal-like protists … sporozoans – parasitic, reproduces by spores example: Plasmodium (malaria)

9. 2. plant-like (algae) – contain chlorophyll and are photosynthetic *Euglena – can make and consume food http://micro.magnet.fsu.edu/moviegallery/pondscum/pro tozoa/euglena/rostrifera/index.html Can be …

10. More plant-like protists … diatoms – various shapes, cell walls of silicon are used in toothpaste and scouring products

11. More plant-like protists … *dinoflagellates – have flagella; one example causes red tide

12. Still more plant-like protists … *multicellular algae – green, brown, red

13. 3. fungus-like – cell walls, absorb nutrients, reproduce by spores *slime molds Can be …

14. More fungus-like protists … *water molds – ex. Phytophthora infestans – cause of Irish potato famine (1845 – 1852)