Lesson 8 of 9

Unicellular organisms

Goal: Describe how unicellular organisms are adapted.

Puzzles for this lesson

A unicellular organism is a single cell that does every job needed to stay alive.

Swipe to meet three of them.

Changes shape to move.

Wraps around its food to eat it.

Swims with a whip-like tail called a flagellum.

Has chloroplasts, so it can make its own food.

Has no nucleus. Its DNA floats in the cytoplasm.

Much smaller than an animal or plant cell.

Your turn

This lesson’s activity starts here in a moment.

I can describe one feature each of an amoeba, a euglena and a bacterium.I can say why a single cell must do every job.

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Cell Smallest building block of a living thing

Nucleus Controls the cell

Cytoplasm Jelly where reactions happen

Chloroplasts Absorb light for photosynthesis

Unicellular Made of one cell

Organ Different tissues working together

Flagellum Whip-like tail for swimming

For teachers: AQA 3.8.2 · Pearson Edexcel 2.7, bacteria only · Cambridge 7Bs.01 in part