The given diagram shows the central core of root in a certain plant. P is phloem and protoxylem elements and V is metaxylem. What is correct for structures indicated by arrows?
1. | They show aerenchyma essential for aeration of root cells |
2. | They show cells in the roots that contain chloroplast |
3. | They show cells lack the characteristic radial and inner tangential wall thickening which is common to endodermal cells |
4. | They show cells that store resins and oils in the roots |
In the given diagram if xylem is represented by 1, the companion cells will be represented by:
1. 2
2. 3
3. 4
4. 5