Lignin is deposited in the xylem vessel walls of an oak seedling.
Which statement describes an effect of lignin deposition on the vessel cells?
It fills the vessel cells with cytoplasm.
It causes the vessel cells to develop sieve plates.
It causes the vessel cells to die.
It joins the vessel end walls together.
80 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.