Question

Study the diagram given below and then answer the question that follows: 

State the function of the parts labelled 1, 2, 3 and 4. 

Answer 1

1 → Sieve cells: Help in the transport of food from leaves to storage organs and other parts of the plant.

2 → Phloem parenchyma cells: Storage of starch, fat and other organic food material.

3 → Companion cells: Help in the functioning of the sieve tube cells.

4 → Sieve plate: Perforations in the sieve plates allow water and dissolved organic solutes to flow along the sieve tube.