Lignin in xylem walls

  1. strengthens the vessel and prevents collapse
  2. makes vessels living
  3. allows sucrose transport
  4. forms sieve plates
Answer

A) strengthens the vessel and prevents collapse

Lignin provides strength and waterproofing. AS & A Level Biology · Topic 7 Transport in Plants · 7.1 Structure of transport tissues

Biology MCQ · More A Level Biology: Transport in plants MCQs · Practise