A-LevelBiologyTransport in plants9700/12 · Feb/Mar 2021 · Q261 Mark
What is an example of a mass flow system in a plant?
Athe loading of amino acids from the surrounding tissues into companion cells
Bthe movement of sap through the phloem sieve tubes in the stem
Cthe movement of water across the root along the symplastic pathway
Dthe movement of water vapour from the internal spaces in the leaf out through the stomata
✓ Correct answer
B: the movement of sap through the phloem sieve tubes in the stem
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