Protists—Chapter 21
Discovery of Protists
 Anton van Leeuwenhoek
o Live around __________ years ago
o He was the first to…
 What can you find in a single drop of water?
Evolution of Protists
 Evolved from ______________ 1.5 ____________ years ago
 Protists are the first known ____________________________
 Lead to the evolution of
o
o
o
What is a protist?
 A eukaryote that cannot be classified as __________, _________, or
_________________
 An organism that has very ____________________________
 A ____________________ organism that lives in _____________
 Can be grouped into two general categories:
o
o
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How many cells?? (It Depends!!)
 Most are __________________, but some are ________________
 Some are _____________________
o The colony acts like a _______________________
Protist Colonies
Describe what you see in the video…
What is their function?? (It Depends!!)
o _________________________ (make their own food by photosynthesizing)
o _________________________ (eat other organisms for energy)
o _________________________ (breakdown dead organisms for energy)
Protists: The 411
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3 Main Types
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Plant-like Protists--AKA
 Strictly _______________________
 Distinguished by the type of photosynthetic ________________
 Classified based on cell or body shape
1. Green Algae – Phylum
2. Brown Algae – Phylum
3. Red Algae – Phylum
4. Diatoms – Phylum
o Unicellular
o Cell wall contains ____________________ which is a mineral found in
______________
o Double shell that fits like a __________________________
o What are the shells used for?
5. Dinoflagellates – Phylum
o Have two _______________
o What are red tides?
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6. Euglenoids – Phylum
o Have one ______________
o What does a euglena use its eyespot for?
o Found mostly in ____________________
Animal-like Protists—AKA
 Classified based on their type of __________________
 How do they ingest their food?
1. Paramecium – Phylum
o Move by beating…
o What is the contractile vacuole used for?
2. Amoebas – Phylum
o How do amoebas move?
o Where can you find amoebas?
3. Sporozoans – Phylum
o All __________________
o How are they transmitted?
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o Malaria
o One of the most deadly diseases in humans
o Caused by _______________________________
o How does a person contract malaria?
o Over _________ million people have malaria
o Up to ________ million, mostly children, die every year
o Symptoms include:
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2.
3.
4.
o Watch the video. What is this video clip about?
Fungus-like Protists—AKA
1. Plasmodial slime molds—Phylum
o Look like _________________________
o How do they eat?
2. Water molds – Phylum
o Usually feed on ___________________
o Responsible for…?
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