A narrow ring of tissue is removed from a woody stem. The phloem is removed, but the xylem remains intact. All the leaves are above the ring.
Which result is most likely during the first few hours?
Sucrose accumulates above the ring while water stops reaching the leaves.
Sucrose accumulates below the ring while water still reaches the leaves.
Sucrose accumulates below the ring while water stops reaching the leaves.
Sucrose accumulates above the ring while water still reaches the leaves.
43 exam-style questions on Edexcel GCSE Biology 6.2 Transport in plants, covering 6.2.1 Root hair cell adaptations, 6.2.2 Structure of xylem and phloem, 6.2.3 Transpiration and stomata, 6.2.4 Translocation of sucrose, 6.2.5 Leaf structure for photosynthesis, 6.2.6 Environmental factors on water uptake, 6.2.7 Rate calculations for transpiration, and 6.2.8 Plant adaptations to extreme environments. Each one has a worked solution and a mark scheme showing where the marks go.