ProtistsFrom Bacteria to Plants Chapter 3.1
Pages 80-89
The Junk Drawer Kingdom• All protists are Eukaryotes: organisms that
have cells with a nucleus• Protists vary widely…– Some unicellular, some multicellular– Some heterotrophic, some autotrophic– Some mobile, some immobile
• Divided into 3 categories.
Animal-like
• Known as Protozoans–Protozoan are
heterotrophs (cannot make own food)–Able to move freely–Are unicellular
• Are 4 different types.
Protozoans: Types I & IISarcodines
• Have bulges of the cell membrane that fill with cytoplasm called Pseudopods (false foot)
• Use this ‘foot’ for movement
• Also use it to trap food.
Ciliates• Have organelles called
Cilia, hair-like structures that move like a wave
• Used to move, obtain food, and sense like whiskers.
Protozoans: Types III & IVZooflagellates
• Posses flagella, used for locomotion
• Live inside other organisms• When both organisms
benefit from a relationship, it is a type of symbiosis called Mutualism
Sporozoans• Are parasites• Move in a variety of ways
– On their own (flagella / slime)
– Or depend on host• Can feed off multiple
hosts, like Plasmodium– Humans and Mosquitoes
spread malaria (fever & chills).
Fungus-like Protists
• Heterotrophs• Have cell walls• Reproduce using Spores: tiny cell that grows into a new organism• Able to move at some point.
Live inwater
Live inmoist
places
Look
fuzz
y or
thre
adlik
eWater Molds Downy Mildews
Fungus Among Us• Slime Molds live in moist soil or decaying
plants & trees– Often brightly colored
• Move using pseudopods• Feed on other bacteria
Plantlike Protists• Called Algae• All are autotrophs• Can live in groups of
several thousand called Colonies
• Differentiated by color of chemicals or Pigment.
-Most live in water, but
some found in moist soil
-Unicellular, Multicellular or
Colonies
-Deep water seaweeds
-Pigments are good at
absorbing sunlight at
great depth
-Common seaweed
-Live in cool waters
-Can be very large and
create ‘forests’
Green Algae Red Algae Brown Algae
What to Work On
• Read textbook pages 80-89• Answer the Section 3.1 Review questions
on page 89 (#’s 1-3)
DUE: Friday, October 21st