The Pressure Flow Or Mass Flow Hypothesis

Select the incorrect statement.

1.	Transport of molecules in phloem can be bidirectional.
2.	The movement of minerals in the xylem is unidirectional.
3.	Unloading of sucrose at the sink does not involve the utilization of ATP.
4.	Elements most easily mobilized in plants from one region to another are phosphorus, sulfur, nitrogen, and potassium.

"Girdling Experiment" was performed by Plant Physiologists to identify the plant tissue through which:

1.	osmosis is observed
2.	water is transported
3.	food is transported
4.	for both water and food transportation