Practice Example: Cactus (4.3.2) - Transport of food and minerals in plants

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6 sample questions

Question 1.
What are the spines of a cactus?
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Ask yourself where the leaves of a cactus have gone.
Question 2.
Which part of a cactus makes food, and how can you tell?
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Look for the green part of the plant.
3Question 3.
The spines of a cactus are modified:
- Roots
- Leaves
- Flowers
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Which part of most plants loses the most water?
4Question 4.
In a cactus, photosynthesis mainly takes place in the:
- Green stem
- Spines
- Roots
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Photosynthesis needs chlorophyll.
Question 5.
A gardener waters a potted cactus every day, and after a few weeks its base turns soft and starts to rot. Use what you know about the cactus to explain why.
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Think about how much water a cactus loses each day compared with a leafy plant.
Question 6.
During a long drought, a cactus survives but a sunflower growing nearby wilts and dies. Explain the difference using the ideas of absorption, storage and transpiration.
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Compare the two plants under each of the three headings in turn.

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