Which statement correctly describes an event in the process of mass flow in phloem sieve tube elements?
1 )
Any part of a plant where sucrose is loaded into a sieve tube element is called a sink.
2 )
Loading sucrose into a sieve tube element increases the water potential inside it.
3 )
Mass flow in the phloem is a passive process occurring at the same rate as diffusion.
Sucrose moves down a hydrostatic pressure gradient in the phloem from source to sink.
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