- Animal-like protists
- Plant-like protists
- Fungus-like protists
Phylum Ciliophora (Cilia bearing protists)
- Large organisms ~305 micrometers long
- Important features:
- Have 2 nuclei
- Macronucleus (large)
- Micronucleus (smaller)
- Feed by forcing H2O into Gullet forming food vacuoles
- Excrete wastes through anal pore
- Excrete excess water through use of contractile vacuoles.
Plasmodia inside liver cell
Phylum Sarcodina (Protists with false feet)
Single Cellular Algae
Most abundant form of marine algae.
Form elaborate silicon (glass) shells to protect themselves
Shell is porous to allow materials in/out of the cell.
Are not generally true multicellular organisms, but rather "colonies"
Show beginnings of specialized functions / tissues
Green algae (Chlorophyta)
contain chlorophyl a & b
Most frequently found in fresh water
Volvox (colonial green algae)
Red Algae (Rhodophyta)
Found in salt/brackish water
Have additional pigments which give them a reddish color.
In uncontrolled blooms, these organisms can cause serious ecological damage
Brown Algae (Rhodophyta)
Most Plant-like of all algae.
Can grow to huge sizes (100')
Most primitive plant like organism to show alternation of generations.
Fungus like Protists:
Act as decomposers
Often have a slimy appearance/texture, hence their name.
Plasmodial slime molds
Cellular slime molds
Plasmodial Slime Molds
Can grow very large, however, is still a single cell (with many nuclei)
Feeding stage is called a plasmodium.
Forms fruiting bodies under stress.
Cellular Slime Molds:
Exists a majority of its life cycle as an amoeba
In times of stress these amoebas unite to form a Pseudoplasmodium, which crawls to another location (slug form), and forms a fruiting body
Cellular Slime mold life cycle
Water mold attacking a fish
Last Updated: March 20, 2005