state three secondary functions of roots,stems and leaves

Answer 1

Generally:
Roots- Absorption of water and minerals, anchorage, food storage (some more than others), reproduction (some).
Stems - Translocate water and minerals to the leaves; transport food (sap) downward from the leaves to the roots.
Leaves - the major photosynthetic (food making) organ of a plant. Provides for transportation of nutrients and a source for osmotic pressure.