Protists
Domain: Eukarya
Kingdom: Protista
Protists are:
Single-celled (unicellular) or simple multicellular,
microscopic,
eukaryotic (with a nucleus) organisms
(Phytoflagellates):
• Autotrophs
(self-
nourished)
•
Producers - produce their own
food from light.
Algae
•Green Algae (7500sp)
•Red Algae (5000sp)
•Used in making ice cream
•Brown Algae (1500sp)
Euglena
Flagellum
•Uses its eyespot to
sense sunlight
•Moves by 2 flagella (1
Eyespot
short and 1 long)
•Contains chloroplasts to
produce food for itself
Chloroplasts
Diatoms
•Colorful - Many Shapes
•Phytoplankton
• Used to make
toothpaste, insecticides
and dynamite
Dinoflagellates (whirling-whip)
2 Flagella; Cell Wall
Red Tide
Heterotrophs (other-nourished) that
MOVE
Protozoans
Protists that move, but cannot make their own food
Sarcodines
•
Pseudopods -extensions
of the cell membrane and
cytoplasm
•
Engulf food particles
•
Assist with movement
Amoeba
Radiolarian
Ciliates
•
Have small, hair-like
projections called cilia on
the outside of their
bodies
•
Provide movement
•
Act as sensors
•
Can help sweep in food
Paramecium
Zooflagellates
•
Protists that move using
a flagellum
•
Live in water or within
other organisms
•
Symbiotic relationship:
Termites and wood
roaches rely on a type of
zooflagellate to digest the
wood
Heterotrophs that can’t move
•
Slime Molds – Cause of
the great potato famine in
Ireland; reproduce by
spores
•
Sporozoans – parasites
that feed on cells and
body fluids of their host
animal
•
Reproduce by
producing spores
Example: Plasmodium causes malaria, is transmitted by
mosquitos