A gardener removed a ring of bark from around the main stem of a tree. This removed the phloem but did not damage the xylem.
After several weeks, the stem just above the ring had swollen.
Explain why the stem swelled just above the ring.
The leaves on the tree did not wilt in the weeks after the ring of bark was removed.
Explain why.
After several months the tree died.
Suggest why.
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.