A student draws an accurate labelled plan diagram of a section of a leaf that contains a vascular bundle. Which statement correctly describes one part of their plan diagram?
- AThe vascular bundle has labels for the xylem vessel elements, phloem sieve tube elements and companion cells.
- BThe vascular bundle is divided into two sections, with the section closer to the upper epidermis labelled as xylem and the other section labelled as phloem.
- CIn the section of the vascular bundle positioned closer to the lower epidermis, each sieve tube element has an associated companion cell.
- DThe phloem sieve tube elements are drawn with thick cell walls to represent the lignin in the walls.