Rolled leaves in marram grass reduce water loss by

  1. increasing air movement
  2. increasing surface area
  3. opening stomata wider
  4. trapping humid air around the stomata
Answer

D) trapping humid air around the stomata

Humid air lowers the gradient. AS & A Level Biology · Topic 7 Transport in Plants · 7.2 Transport mechanisms

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