2. The Junk Drawer Kingdom
Protists
The Junk Drawer Kingdom

3. What is a protist? This Kingdom is very diverse!!
General characteristics
Eukaryotic – Contains a nucleus
Both Unicellular and Multicellular
Both Heterotrophs and Autotrophs
May or may not have a cell wall

4. Organizing Diversity Protists are organized into three categories
Plant-Like Protists
- Also called Algae
Animal-Like Protists
- Also called Protozoans
Fungus-Like Protists

5. Animal-Like Protists (Protozoans)
Cell Structure: No Cell Wall
Unicellular
Classified Based on how they move and obtain food (locomotion)
Mode of nutrition:
heterotrophs
Separated into 4 Different Phylum

6. Phylum Sarcodina - Sarcodines
Amoeba
Amoeboid Movement
Move and eat using pseudopods (False Foot)
Heterotrophs – Use food Vacuole

7. Phylum Ciliophora - Ciliates
Ex. Paramecium and Stentor
Move and eat using cilia –
Short hairlike projections, similar to flagella
Mostly freeliving – not parasitic

8. Phylum Zoomastigina - Zooflagellates
Ex. Trypanosoma –
Causes African
Sleeping Sickness
Trichonympha –
in digestive system
of termites
Move using a flagella
Free living or parasitic

10. Phylum Sporozoa - Sporozoans
Ex. Plasmodium – Causes Malaria
Do not move on
their own
Are parasitic

11. Plant-Like Protists (Algae)
Cell Structure: All contain chlorophyll and Unicellular or Multicellular
Classified Based on Color
(Accessory Pigments)
Mode of Nutrition:
Autotrophs
Separated into 6 Different Phylum

12. Phylum Euglenophyta 2 Flagella No Cell Wall Eye Spot to detect light
Autotrophs, but can be
Heterotrophs
when sun is
not available
Euglena

13. Phylum Pyrrophyta - Dinoflagellates
½ Autotrophs and ½ Heterotrophs
2 Flagella – Can spin
Can be luminescent – “fire plants”
Cause of Red Tide-
Produce neurotoxins
Kills marine life

14. Bioluminescence

15. Phylum Bacillariophyta - Diatoms
**Most abundant organisms
on earth- Golden algae
Unicellular
Autotrophs
Cell Walls of silicon like the
main ingredient in glass

16. Phylum Rhodophyta – The Red Algae
Mostly Multicellular
Cholorphyll A & Red
Pigment Phycobilins
Live at Great Depths
Used in ice cream & pudding

17. Phylum Phaeophyta – The Brown Algae
Ex. Brown Kelp
Multicellular
Contain Chlorophyll A &C
Largest Most Complex Algae
Up to 60 Meters Long
Used in fertilizer
and toothpaste

18. Phylum Chlorophyta – The Green Algae
*Ancestor to Modern Plants*
Ex. Volvox and Spirogyra
Contain Chlorophyll A and B
Cellulose in Cell Wall
Used in cosmetics, paints,
and food
Major Source of fish
food and oxygen

19. Fungus-Like Protists
Cell structure: Unlike true fungus lack chitin in their cell wall and have centrioles
Mode of nutrition: Heterotrophs – decomposers
No chitin in their cell wall
Reproduce by forming spores
Damp, Moist Environments

20. Phylum Acrasiomycota Cellular Slime Mold No cell wall
Unicellular but colonize

21. Phylum Myxomycota Acellular Slime Mold
Fuse together to become larger structure with multiple nuclei

22. Phylum Oomycetes Water Molds Thrive in water
Cellulose in the cell wall
Plant parasites on land
Caused Potato Famine