(i) Plants do not have a pumping organ like the heart. Transport in plants occurs through diffusion and osmosis, which are passive and slow processes. Also, plants have low energy demands, so a slower transport system is sufficient.
(ii) Phloem transports food (sucrose/glucose) prepared by leaves during photosynthesis to all other parts of the plant — roots, stems, fruits, and seeds. This process is called translocation and requires energy (ATP).