Unit 6: Microorganisms and Fungi Chapter 20: Protists.

Unit 6: Microorganisms and Fungi

Chapter 20: Protists

Key Concepts:

What are protists? What are the types of animal-like

protists? What are the types of plant-like

protists? What are the types of fungus-like

protists?

A. The Kingdom Protista

1. Protists - any organism that is Eukaryotic; but not a plant, animal, or fungi.

2. Protists can be unicellular, multicellular, or colonial.

3. Protists are either: a) heterotrophic (animal-like)b) autotrophic (plant-like)c) decomposers/parasites (fungus-like)

B. Animal-Like Protists

1. Phylum Zooflagellates – a) Move using a flagella (whip-like tail)b) Can have one or two flagellac) Most reproduce asexuallyd) Absorb food through their cell-

membranes

2. Phylum Sarcodina – (sarodines)a) Move by pseudopodia (false feet)b) Usually live in waterc) Captures food by wrapping the

pseudopodium around it and ingesting it.

d) Example: Amoeba

3. Phylum Ciliophora (ciliates)a) Use cilia for feeding and movementb) Found in fresh and salt waterc) Free-living – don’t exist as parasitesd) Example: Paramecium

4. Phylum Sporozoaa) All members of this phyla are

PARASITESb) Life cycles involve more than one hostc) Examples: The Plasmodium

sporozoan causes malaria and is carried by the female Anopheles mosquito

Section 20-2

Figure 20-7 The Life Cycle of Plasmodium

C. Plant-Like Protists

1. Phylum Euglenophyta (euglenophytes)a) Move by 2 flagellasb) Have no cell wallc) Reproduce asexuallyd) Performs photosynthesis (make’s it’s own

food)e) Example: Euglena

2. Phylum Chrisophyta (chyrsophytes):a) Gold-colored chlorophyllb) Includes yellow-green algae and golden-

brown algae

3. Phylum Bacillariophyta (Diatoms)a) Produce thin, delicate cell walls rich is

silicon – the main component of glassb) Sexually reproduce and asexually

reproduce.

4. Phylum Pyrrophyta (dioflagellates)a) ½ are photosyntheticb) ½ are heterotrophicc) Have 2-flagellad) Reproduce asexuallye) Cause of red Tides

5. Phylum Rhodophyta: (red Algae)

a) Lives in deep water

b) Contains chlorophyll A

c) Multicellulard) Helps form coral

reefs

6. Phylum Phaeophyta (Brown Algae)

a) Marine organismsb) Live in shallow

waterc) Most complex

algaed) Contains

Chlorophyll A and C

6. Phylum Chlorophyta: (green algae)

a) Cell wallb) Chlorophyll A

and Bc) Found in fresh

and marine water

d) Single celled, multi celled, and colonial.

C. Fungus – Like Protists

1. Phylum Acrasiomycota (cellular slime molds)

a) Free-living cellsb) Absorb nutrients

from dead/decaying matter

2. Phylum Myxomycota (acellular slime molds)

a) Single cell with many nuclei

3. Phylum Oomcota (water Mold)

a) Feed on dead or decaying matter,

b) Both sexual and asexual reproduction

c) Caused the Potato Famine of Ireland in 1846