1. The Kingdom of Protista
This section explains what protists are.

2. What is a Protist? What Is a Protist?
It is any organism that is not a plant, an animal, a fungus, or a prokaryote.

3. What Is a Protist?
Circle the letter of each sentence that is true about protists.
All cells have a nucleus.
All cells have membrane-bound organelles.

4. What Is a Protist?
Why are some organisms that consist of thousands of cells considered to be protists?
They are considered protists because they are so similar to others that are truly unicellular.

5. Evolution of Protists
The first eukaryotic organisms on Earth were____.
Protists

6. Evolution of Protists
What is biologist Lynn Margulis’s hypothesis about where the first protists came from?

7. The first eukaryotic cells may have evolved from a symbiosis of several cells.
Mitochondria and chloroplasts found in eukaryotic cells may be descended from aerobic and photosynthetic prokaryotes that began to live inside larger cells.

8. Classification of Protists
Complete the table about protist classification.
GROUPS OF PROTISTS
Group
Method of Obtaining Food
Animal like protists
Consume other organisms
Plant like protists
Produce their own food by photosynthesis
Fungus like protists
Obtain food by external digestion, either as decomposers or parasites

9. Classification of Protists
What don’t categories of protists based on the way they obtain food reflect about these organisms?
They don’t reflect their evolutionary history.