1. Plant-Like Protists
Chapter 19 p. 553

2. Plant-like Protists Plant-like Protists • mostly autotrophic
•live in soil, on the bark of trees, in fresh water, and in salt water
produce most of the atmospheric oxygen
form the base of aquatic food chains
reproduce asexually and sexually
unicellular, multicellular, or live in colonies

3. Phylum Euglenophyta Euglenoids •unicellular
•contain plant and animal characteristics
• plant characteristics
• contain chloroplasts
• usually autotrophic, may lose chloroplasts
and become heterotrophic
have a light sensor for photosynthesis
• animal characteristics
• movement by flagella
• no cell wall

5. Phylum Pyrrophyta (Fire plants)
•(usually) unicellular
•flagellated (2)
•flagellum allows for distinctive spiral to their swimming motion
•photosynthetic protists
Cell wall
Asexual Reproduction
Contain Bioluminescence – create light!

7. Bioluminesence
Red Tide Explained

8. Bacillariophyta (Diatoms)
•unicellular, containing two shells called valves
‘skeleton’ made up of silica
•yellow-green to golden-brown
they store their food as oil instead of carbs, allows them to float at the oceans surface for photosynthesis!
•dead organisms used as abrasives (tooth polishes!), reflectives, and filters
•make up much of ocean floor
Asexual and Sexual Reproduction
Example
•diatoms

10. Algae •most unicellular, some multicellular or in colonies
•important source of food and oxygen
•classified by color and structure
• golden algae (Chrysophyta)
• green algae (Chlorophyta)
• brown algae (Phaeophyta)
• red algae (Rhodophyta)

11. Chrysophyta Golden Algae
•mostly autotrophic, can form cysts
•most unicellular and flagellated, some filamentous and colonial
•grouped by color or color pigments and cell structure
•important in petroleum formation
Sexual and asexual reproduction
Example
•Synura, Dinobryon
CNN BIOFUEL
Biofuel 2015

13. Chlorophyta Green Algae
•unicellular and multicellular
•most freshwater, some live on land
•thought to be ancestors of plants
• contain the same chlorophyll, and cell walls
• some have parts that resemble roots, stems,
and leaves
Freshwater and salt water
Both sexual and asexual reproduction
• Examples
•Volvox – use flagella for movement
Video

14. Volvox

16. Phaeophyta Brown Algae
•multicellular
•have parts that resemble roots, stems, and leaves
•some are anchored - Laminaria kelp
•some float - “sea weed”
•important source of iodine
• used as food additives or food
Sexual and asexual Reproduction
Examples
•Laminaria, Sargassum

18. Rhodophyta Red Algae •multicellular - the most complex algae
•most marine - some live deeper than most algae
•pigments trap “blue light”
•important for food, agar, cosmetics and food additives
Sexual Reproduction only
Examples
Porphyra, Gracilaria