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Cells in Water
Age 11 · Biology
Long ago, life began in water as tiny single-celled microbes. Later, some cells gained a nucleus and DNA, and many cells joined to make larger bodies.
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Age 11: open this week
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In the picture
- Single-celled microbe: one living cell on its own in water
- Cell group: several cells held together as one body
- Nucleus: the rounded control centre inside the cell
- DNA strand: the coiled instruction thread inside the nucleus
Examples
- Pond water under a microscope can show tiny single-celled life.
- Your body is made of many cells, and each cell contains DNA.
Key takeaways
- The first life on Earth lived in water and was made of single cells.
- Cells with a nucleus store DNA and can join to form many-celled bodies.
Quiz: Cells in Water (Age 11)
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Where did the first life on Earth live?
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What were the first living things on Earth made of?
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What is DNA described as inside a cell?
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