Euglena Classification Activity Sheet
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Euglena
STUDENT RESOURCE 1.3
ACTIVITY SHEET
Euglenas are one-celled algae. Look for tiny green organisms
moving on the slide. When you see a euglena, look for the
structures shown in the diagram.
Eyespot
(senses light)
Nucleus
(controls the cell)
Flagellum
(moves the cell)
Chloroplast
(contains chlorophyll)
Movement A euglena moves by whipping its flagellum around
like a helicopter propeller.
Feeding A euglena has chloroplasts that contain chlorophyll.
When light is available, the euglena makes it own food the way
a plant does. When there is not enough light for photosynthesis,
the euglena acts like an animal and captures food.
Reproduction When a euglena gets too large, it divides in half.
The nucleus splits, too.
Size 35 µm
Answer the following questions.
1
How many euglenas would fit end to end in 1 mm?
2
How does a euglena find light?
CLASSIFICATION • SECTION 1 MICROORGANISMS
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