Year 7 Science · Unit 1 · Lesson 08
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Learning Goals
Compare two
Complete the table to compare animal cells and plant cells. Fill in as many cells as you can using what you know from the lesson.
| Feature | Animal Cell | Plant Cell |
|---|---|---|
| Presence of cell wall | ||
| Chloroplasts | ||
| Vacuole | ||
| Organelles found in both | ||
| Typical shape | ||
Predict + reason
Scenario
A biologist places an animal cell into a highly concentrated salt solution. The cell membrane remains intact, but the cell shrivels and shrinks within minutes. The biologist notes that the contents of the cell appear more crowded than before.
(a) Predict: What happened to the water inside the cell when it was placed in the salty solution?
(b) Justify: Use what you know about the cell membrane to explain why the cell shrank. Why did the membrane stay intact while the cell still changed shape?
1. A kangaroo's muscle cells need lots of energy for jumping. Which organelle would you expect muscle cells to have in large numbers? Explain why, using what you know about how animal cells get their energy.
2. Explain why it makes sense that animal cells have a flexible membrane rather than a rigid cell wall. Link your answer to the lifestyle of animals.
Wrap Up
In one sentence, what was the main idea of this lesson?