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ProtistsThe Junk Drawer Kingdom
Notes # 22
Protists• Most are unicellular
• All live in moist environments
• Are all eukaryotic
—Have cells with nuclei
Animal-like Protists
•Are heterotrophs
•Most are protozoan
are able to move from place to place to obtain their food
•Are unicellular
Protozoans
4 types
pseudopods
ciliates
zooflagellates
sporozoans
Pseudopods•pseudopods: fake feet
—forms when the cell bulges out and fills with cytoplasm —used to respond to changes in environ. like escaping light or temp., and for gathering food—Ex: Ameba
Ciliates
•Have cilia
•Ex: Paramecium
•Hairlike structures that move in a wavelike pattern
•Use to move, get food, sense environ.
Zooflagellates
•Use 1-8 flagella to movewhiplike tail used to move
•Ex: Giardia lamblia—lives in streams and causes hiker’s disease
•Ex: live inside termites
Sporozoans
•Feed on cells and body fluids of host
•Ex: Plasmodium—causes malaria
•Parasites
Fungi-like Protists•Heterotrophs
•Have cell walls
•Use spores to reproduce
•Able to move at some point in lives
•3 types: water molds downy mildew
slime molds
Plant-like Protists
•Commonly called algae
•Autotrophic
•Some live in soil, tree bark, and fresh and salt H2O
•Ex: Euglenoids, dinoflagellates, diatoms, and green, red, and brown algae