Sucrose is carried dissolved in the phloem of plants. Movement occurs from sources to sinks. This process relies on differences in hydrostatic pressure between the sources and the sinks. Which tissues act as a source or a sink, and what are the hydrostatic pressures at X and Y inside the phloem?
- Aleaf: sink; root: source; high pressure: X; low pressure: Y
- Bleaf: sink; root: source; high pressure: Y; low pressure: X
- Cleaf: source; root: sink; high pressure: X; low pressure: Y
- Dleaf: source; root: sink; high pressure: Y; low pressure: X