Animal-like Protists and Funguslike Protists

Animal-like Protists and
Funguslike Protists
Before we begin…some review
What does the term “eukaryotic” mean?
What does the term “heterotroph” mean?
What does the term “autotroph” mean?
What is the difference between “unicellular”
and “multicellular”?
What is a Protist?
• Diverse kingdom – sometimes called “junk
drawer kingdom”
• Are all eukaryotes
• All live in moist environments
• Mix of unicellular and multicellular
• Mix of autotrophs and heterotrophs
• Most have contractile vaculoes – pump water
out of the organism
Example Protists
The Amoeba
The Paramecium
Grouping Protists
• Protists are classified into three groups:
– Animal-like protists
– Funguslike protists
– Plant-like protists
Animal-like Protists
• Also called protozoans
• All heterotrophs
• All unicellular
• Divided into four groups
Protozoans with Pseudopods
Protozoans with Cilia
Protozoans with Flagella
Protozoans with Pseudopods
• These protists are called sarcodines.
• They all have pseudopds that allow them to
move and trap food.
– Pseudopod – “false foot”; temporary bulge of the
cell membrane that fills with cytoplasm
• Example – Our old friend, the amoeba
The Amoeba
Protozoans with Cilia
• These protists are called ciliates.
• They all have cilia that allow them to move,
obtain food, and sense the environment.
– Cilia – hairlike projections from a cell that move in
a wavelike pattern.
• Example – paramecium
Protozoans with Flagella
• These protists are called zooflagellates.
• They all have flagella that help them move.
– Flagella – long, whiplike tail
• Many live in symbiosis in other organisms.
– Symbiosis – interaction between two species
• Example - Giardia
Other Protozoans
• These are called sporozoans.
• They are all parasites that feed on the cells
and body fluids of their hosts.
• Example – Plasmodium, causes malaria
Funguslike Protists
• Have cell walls
• Use spores to reproduce
• Are heterotrophs
• Three types:
– Water molds
– Downy mildews
– Slime molds
Water Molds and Downy Mildews
• Live in water and moist places
• Grow as tiny threads that look fuzzy
• Can also attack food crops
– Water mold destroyed potato crops in 1845-1846
and caused the Irish Potato Famine that killed
over a million people!
Water Molds and Downy Mildew
Water mold growing on a fish.
It is a parasite that will eventually kill the fish.
Downy mildew growing on lettuce.
Slime Molds
• Live in moist soil and on decaying plants and
• Can form pseudopods and eat bacteria
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