the movement of dissolved substances to where they're needed in the plant
assimilates
disolved substances
Translocation is an energy-requiring process that happens in the phloem.
Translocation moves substances from 'sources' to 'sinks'. The source
of a substance is where it's made (so it's at a high concentration there). The sink is the area where it's used up (so it's at a lower concentration there).
Enzymes maintain a concentration gradient from the source to the
sink by changing the dissolved substances at the sink (e.g. by breaking them down or making them into something else). This makes sure there's always a lower concentration at the sink than at the source.
