Kingdom Protista

1
Kingdom Protista

• Unicellular plants and animals

2
General Information

• Protista, from the Greek protistos first
• Diverse group
• Aka Algae Protozoa
• Most are Unicellular
• exception Volvox is colonial

3
Characteristics

• A. Eukaryotic
• (have a nucleus)

4
Characteristics

• B. Many feeding patterns
• some plant-like, (autotrophs)
• some animal-like, (heterotrophs)
• some fungus-like(absorb food from the dead)
• some parasite-like (pathogens, eat the living)

5
Characteristics

• C. Big or tiny
• D. Unicellular or colonial
• E.Have weird features, like photosensitive areas
  (eyespots)

6
3. Habitats

• Almost anywhere there is water

7
4. Reproduction

• Asexual
• Sexual
• Both, alternating

8
Ciliophora - Conjugation
9
Reproduction

• Alternation of Generations
• ? switch btwn. asexual repro. (spores)
• sexual repro. (gametes) back again

10
5. Specialized Cells

• Cells specialized for f(x)s
• Division of labor
• E.g. holdfast cell, gamete-forming cells

Holdfast cell
11
6. Classification by Exclusion

• ? If organism doesnt belong in any other phylum,
  put it in this one!
• I.e. Weirdos go in this group!

12
7. Protist Groups

• Pseudopodia for locomotion
• false feet
• Animal-like, parasites
• AMOEBAS
• E.g. ?Amoeba
• E.g. Entamoeba histolytica
• (amoebic dysentary)

13
7. Protist Groups

• b. Foraminifera
• Source of CaCO3
• (calcium carbonate / chalk)
• E.g. The
• white cliffs
• of Dover

14
7. Protist Groups

• c. Diatoms
• Photosynthetic, unicellular, double shells
• of SiO3(glass)

15
7. Protist Groups

• d. Green Algae
• plant-like protists
• E.g. ?Volvox

16
7. Protist Groups

• e. Red Algae

Source of agar (growth medium for bacteria)
17
8. Protist Groups

• f. Brown Algae
• E.g.
• kelp

18
7. Protist Groups

• g. Dinoflagellates
• Protists with Flagella (animal-like)
• Capable of bioluminescence
• (glowing in the dark)
• the red tide
• makes scallops
• toxic to humans

19
Red (Crimson) Tide
20
7. Protist Groups
?Causes giardia / backpackers disease
?Trichonympha in termites digest wood
(cellulose)
21
8. Protist Groups

• h. Euglenoids e.g. ?Euglena
• ?use flagella to move

22
7. Protist Groups

• i. Cilia for locomotion -Ciliates)
• ?Paramecium

23
7. Protist Groups

• j. Slime Molds
• Multicellular
• Single cellular

24
7. Protist Groups

• k. Water Molds
• E.g. potato blight
• Caused potato famine
• in Ireland
• 1845-1847
• 400,000 starved

25
7. Protist Groups

• l. ?Sporozoans
• Cannot move themselves
• Move via vectors (things that carry them)

26
l. ?Sporozoans

• EXAMPLES
• E.g. Plasmodium (causes malaria)
• vector Anopheles mosquito
• E.g. Toxoplasmolysis (from cat feces
• causes fetal death)
• E.g. African sleeping sickness
• vector tsetse fly