K325 / 2027

Nutrition and transport in plants

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Which route correctly describes carbon dioxide entering a photosynthesising leaf?

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Which statement describes a typical herbaceous dicot stem bundle?

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Which condition favours net water entry into a root hair by osmosis?

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Which statement correctly follows photosynthesis into a food chain?

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Why is oxygen volume usually a better measure than bubble count?

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A light-response graph reaches a positive plateau. What can be concluded from that graph alone?

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Which sequence correctly describes the final stages of transpiration?

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Why does higher humidity usually reduce transpiration when other conditions are held constant?

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Which chain best explains wilting?

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A mature leaf supplies a developing fruit above it. Which description is correct?

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Question 1 of 6

Identify transport tissue from evidence

A herbaceous dicot stem section shows bundles in a ring. Within a bundle, tissue A is nearer the centre and contains large thick-walled vessels; tissue B is nearer the outside and contains sieve-tube elements beside companion cells. Identify A and B and explain their functions. State their typical upper/lower arrangement in a leaf vein.

Use position, cell features and cargo together.

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