1. Chapter 28 Notes
Protists

2. Protists
Protists exhibit more structural and functional diversity than any other group of organisms.
- all are eukaryotic
- most are unicellular, but some are colonial or multicellular

3. Protists

4. Protists Protists are divided into 3 categories:
Animal-like are heterotrophs which consume other organisms.
Plant-like make their own food through photosynthesis just as plants do.
Fungus-like acquire their nutrients by decomposing dead organisms.

5. Protists
The large diversity in protists is a result of endosymbiosis - early eukaryotes were the result of acquiring mitochondria - a second acquiring of photosynthetic cyanobacteria which evolved into a plastid; led to photosynthetic algae

6. Protists

7. Protists Protists can move in different ways:
- by using a tail-like structure called a flagella
- through the use of cilia, which are short, hair-like structures that cover the cell surface
- by using a fake foot, or pseudopod

9. Protists Animal-like protists are often referred to as protozoa.
- some animal-like protists are parasitic and cause diseases such as malaria and African sleeping sickness.

10. Protists

11. Protists
Plantlike protists -can be one-cell or multicellular - can live in soil, on trees, and in both fresh water and salt water. - do not have roots, stems, leaves

12. Protists

13. Protists Euglenoids single-celled organisms that swim using flagella
Dinoflagellates
-single-celled protists that are primarily marine plankton

14. Protists
Diatoms -single-celled algae that releases into the environment approximately half of the oxygen that we breathe. Algae - green algae are multicellular, and contain chlorophyll, but they are not considered plants because they don’t have roots, stems, or leaves.

15. Protists

16. Protists
Funguslike Protists - Oomycetes - have hyphae but cell walls are made of cellulose, not chitin - usually have flagella - do not carry out photosynthesis; instead are parasites or decomposers

17. Protists