3. Transport Systems

Question 1

Why do multicellular organisms need transport systems

Answer 1

Large size requires transport over long distances
Diffusion too slow as the diffusion distance is too long so can’t rely on diffusion alone
Small surface area to volume ratio
E.g.
transport water/ ions from roots to other parts of plant
Transport products of photosynthesis from source to sink
Transport hormones produced in one part to site of action