8 exam-style questions. Write your answer, check it against the mark scheme and tick the points you earned. Your marks stay on this device. Your writing is not saved.
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3.2 Need for a transport system
Exam question
Mark points shown after marking
Explain why large multicellular organisms need a transport system.
(3)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 3 marks
3.2 Need for a transport system
Exam question
Mark points shown after marking
Which statement explains why an elephant needs a circulatory system but a bacterium does not?
(1)Total for this question: 1 mark
3.2 Need for a transport system
Exam question
Mark points shown after marking
| Side / cm | Surface area / cm² | Volume / cm³ |
|---|---|---|
| 1 | 6 | 1 |
| 2 | 24 | 8 |
| 3 | 54 | 27 |
Calculate the surface area to volume ratio of the 3 cm cube.
(2)Total for this question: 2 marks
3.2 Need for a transport system
Exam question
Mark points shown after marking
| Side / cm | Surface area / cm² | Volume / cm³ |
|---|---|---|
| 1 | 6 | 1 |
| 2 | 24 | 8 |
| 3 | 54 | 27 |
Cubes of pink agar containing indicator are placed in acid, which turns the agar colourless. Predict which cube changes colour completely first and explain.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
3.2 Need for a transport system
Exam question
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State two substances that are transported by the blood to cells and one waste removed.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
3.2 Need for a transport system
Exam question
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Illustrative context: insects have air tubes called tracheae that branch to every tissue.
Explain why insects need a transport system for food but not for oxygen.
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Total for this question: 2 marks
3.2 Need for a transport system
Exam question
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Describe the two transport systems in a flowering plant.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
3.2 Need for a transport system
Exam question
Mark points shown after marking
Suggest why a mouse needs a faster transport system than a lizard of the same mass.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
