1[1 mark]
Which list shows the levels of organisation in order, from smallest to largest?
- Cell, tissue, organ, organ system
- Tissue, cell, organ, organ system
- Cell, organ, tissue, organ system
- Organ system, organ, tissue, cell
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Answer: A A (1)
2[2 marks]
The stomach contains muscular tissue, glandular tissue and epithelial tissue. Explain why the stomach is an organ.
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- it is made of several / different tissues (1)
- that work together to perform a specific function / to digest food (1)
3[2 marks]
Each cell in a tissue is 20 µm wide. Calculate how many cells fit side by side across a width of 1 mm. (1 mm = 1000 µm)
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- 1000 ÷ 20 (1)
- 50 (cells) (1)
- allow 2 marks for the correct answer with no working
4[1 mark]
Which of these is an example of an organ system?
- The heart
- The digestive system
- Muscular tissue
- Palisade mesophyll cell
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Answer: B B (1)