30Plant Structure TransportHard1 mark
The graph shows how hydrostatic pressure in a phloem sieve tube element of a large plant varies
depending on the distance from the leaf.
What describes the movement of sucrose in this sieve tube element?
| source | sink | direction of sucrose movement | |
|---|---|---|---|
| A | leaf | roots | from roots to leaf |
| B | leaf | roots | from leaf to roots |
| C | roots | leaf | from roots to leaf |
| D | roots | leaf | from leaf to roots |