1. Protists

2. What is a protists?
organism that is not a plant, animal, fungus, or prokaryote
most single-celled
1st eukaryotic organism

3. Protozoans:animal like
Zooflagellates: flagella
Sarcodines: pseudopods, extensions of cytoplasm; amoeba
Ciliates: move with cilia
Sporozoans: don’t move

4. Animal-like Protists and Disease
Malaria
African Sleeping Sickness

5. Plantlike Protists: unicellular algae
energy from sunlight
Euglenophytes - two flagella, but no cell wall
Chrysophytes - gold-colored chloroplasts

6. Plantlike Protists: unicellular algae
Diatoms - thin, delicate cell walls made of silicon
Dinoflagellates - ½ are photosynthetic, ½ are heterotrophs

7. Dinoflagellates & Algal Blooms
Grow into large masses or blooms
Decomposition  depletes O2 kills fish and invertebrates
Red Tide

8. Multicellular Algae Red Algae: coral reefs
accessory pigment phycobilins
absorbs blue light  deep ocean

9. Brown Algae: giant kelp
Accessory pigment: fucoxanthin
largest and most complex algae
marine, cool, shallow coastal waters of temperate or arctic areas

10. Green Algae Similar to plants store food as starch
photosynthetic pigments
cell wall
store food as starch
fresh & salt waters, and moist land areas
sea lettuce

11. Human Uses of Algae
Chemicals: stomach ulcers, high blood pressure, & arthritis
Food: sushi, ice cream, salad dressing, pudding, candy bars, pancake syrups, and eggnog
Industry: plastics, waxes, transistors, deodorants, paints, lubricants, and artificial wood

12. Fungus Like Protists heterotrops
Slime Mold - play a key role in recycling organic matter
found in damp places rich in organic matter
forest floor or compost pile

13. Fungi like Protists
Water Mold - thrive on dead or decaying organic matter in water and some are plant parasites on land
Potato Blight