Which row gives the correct description of the adaptations of companion cells, phloem sieve tube elements and xylem vessel elements for their roles?
- Acompanion cell: a thin layer of cytoplasm to reduce resistance to flow; phloem sieve tube element: strong, lignified cell walls for supporting the plant; xylem vessel element: many plasmodesmata for communication between cells
- Bcompanion cell: empty cells allowing water to flow freely; phloem sieve tube element: many plasmodesmata for communication between cells; xylem vessel element: strong, lignified cell walls for supporting the plant
- Ccompanion cell: many plasmodesmata for communication between cells; phloem sieve tube element: a thin layer of cytoplasm to reduce resistance to flow; xylem vessel element: empty cells allowing water to flow freely
- Dcompanion cell: strong, lignified cell walls for supporting the plant; phloem sieve tube element: empty cells allowing water to flow freely; xylem vessel element: a thin layer of cytoplasm to reduce resistance to flow