Translocation in plants result from???

Question

a. a difference in water potential between a sugar source and a sugar sink.

b. transpiration.

c. cohesion-adhesion.

d. active transport by sieve-tube members.

e. active transport by tracheid and vesel elements.

Answer 1

b. Transpiration (pull)

Answer 2

d. active transport by sieve-tube members.

This drives translocation - Cells in a sugar source "load" a sieve-tube element by actively transporting solute molecules into it. This causes water to move into the sieve-tube element by osmosis, creating pressure that pushes the sap down the tube. In sugar sinks, cells actively transport solutes out of the sieve-tube elements, producing the exactly opposite effect.