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Content Mastery
CHAPTER
22
PROTISTS
Get the Big Picture
Read the paragraphs in the boxes and study the picture. Then answer the questions.
Protists are all around us. There are more than 200 000 species in the kingdom Protista.
Protists come in many different shapes, sizes, and colors. Some protists have traits like animals.
Protozoans are animal-like protists. Other protists have traits like plants. Algae are plantlike
protists. Still others have traits like fungi. Slime molds, water molds, and downy mildews are
examples of fungi-like protists.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Protists are important to nearly all ecosystems. Some protists produce large amounts of
oxygen. Other protists form the first link in aquatic food chains. Protists live in almost every
moist habitat on Earth.
They are animal-like protists.
1. What are protozoans? ______________________________________________________________
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2. Why is the kingdom Protista important to other living things on Earth? Give two reasons.
Responses may include two of the following: Protists produce oxygen, provide
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food, and are part of most ecosystems on Earth.
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false
3. True or false? Protists live mostly in dry habitats. ______________________________________
BIOLOGY: The Dynamics of Life CHAPTER 22
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