1. Use this drawing of a paramecium to answer the question. What is the function of the cilia marked by "X"?



to move the paramecium
to take in water and remove wastes
to control cell division
to make food from sunshine and air

2. Use this drawing of a paramecium to answer the question. What is the paramecium's body composed of?

thousands of cells
four cells
one cell and its parts
several body organ systems

3. You are looking at a pond water sample for examples of protozoa and algae. What is the best way to tell the difference between protozoa and algae?

Protozoa are larger than algae
Protozoa move and algae do not
Protozoa are not green while algae are
Protozoa have flagella and algae do not

4. What did Anton van Leeuwenhoek discover that changed what people could see and understand about the living world?

Telescopes
Cameras
Magnifying glass
Microscopes

5. Raquel placed a jar of water containing Euglena, a green plant-like protist, in a sunny window. She placed a black, opaque covering over one half of the jar. What do you think she will observe when she returns in one hour to observe water samples with

She will find more Euglena in the side of the jar in the light
She will find more Euglena in the side of the jar in the dark
She will find Euglena equally throughout the jar
She will find more Euglena at the bottom of the jar

6. What is the one thing scientists have concluded from their observations of microorgansims?

they live only in warm places
they are only waste products
they are almost everywhere
they are tiny plants