Why do taller plants need specialised transport tissues? [Pg. No. 238]

Taller plants need specialised transport tissues because substances cannot move efficiently over long distances by diffusion alone. Their roots absorb water and minerals from the soil, while leaves prepare food by photosynthesis. Therefore, water and minerals must be transported upward from roots to leaves through xylem, and prepared food must be transported from leaves to other parts of the plant through phloem. These tissues help tall plants maintain proper growth, support and survival.