2. PROTISTS
A. Eukaryotes that cannot be classified as animals,
plants or fungi
B. A diverse group
Most are unicellular
Some are large, simple multicellular
Some are heterotrophs
Some are autotrophs
Some are both heterotrophic & autotrophic
Some can move
Some cannot move
All live in moist environments
3. ANIMAL-LIKE PROTISTS
A. Like animals:
Heterotrophic
Most can move
B. Unlike animals:
Unicellular
C. Sarcodines
Move with pseudopods ‘false foot’
Slow moving via the cytoplasm flowing in a direction using the
pseudopod and then the rest of the body follows
Ex. Amoeba
http://www.youtube.com/watch?v=iRQTY_9Yekc
4. D. Flagelattes
Protozoans that use one or more long whiplike flagella to move
Ex. Giardia
http://www.youtube.com/watch?v=-yIHkq9R5_c
E. Ciliates
Use hundreds of hairlike projections, cilia, to move and feed
Ex. Paramecium
http://www.youtube.com/watch?v=fh_yjLppNAg
F. Spore-forming parasitic protists
Feed on the body fluids of their hosts
Most depend on a host for transportation (ex. Mosquito)
Ex. Plasmodium causes malaria
5. PLANT-LIKE PROTISTS (ALGAE)
A. Like Plants:
Autotrophs that use photosynthesis & produce much of the world’s
oxygen
Can be multicellular
B. Unlike Plants:
Can be unicellular
Lack true leaves, stems and roots
Some can move and some are heterotrophic in addition to
autotrophic
C. Euglenoids
Unicellular algae that can act as heterotrophs in the absence of
sunlight
Eyespot used to detect light
Flagella that allows movement
http://www.youtube.com/watch?v=fI7nEWUjk3A
6. D. Dinoflagellates
Unicellular
Flagella
Multicolor and some glow in the dark
http://www.youtube.com/watch?v=EN1Yxq8KMsw
E. Diatoms
Unicellular
Glass-like cell walls
Move by oozing along a slime released from the cell wall
Form diatomaceous earth used in household products like Soft
Scrub and some toothpastes
7. F. Red Algae
Multicellular seaweed
Can grow deep underwater because of it’s ability to absorb even a small
amount of light (~260m)
Nutrient rich food and is used in ice cream (makes it smoother) and hair
conditioner
G. Brown Algae
Most seaweed
The most plant-like in structure of the plant-like protists
Edible and sometimes used as thickeners in puddings and
other foods
8. FUNGUS-LIKE PROTISTS
A. Like Fungus:
Heterotrophs
Cell walls
Reproduce with spores
B. Unlike Fungus:
Are able to move at some point in their life
C. Slime Molds
Brilliantly colored
Unicellular or multicellular
D. Water Molds & Downy Mildews
Live in wet places
Attack crops (ex. Irish potato famine 1845 & 1846)