help plz ? (1 Viewer)

[chomp]

The Transpiration stream does not require energy discuss this statement
Compare the movement of substances within the xylem vessels with translocation

 

[katie_tully]

Okay...so which part do you need help with?
Why doesn't transpiration require energy? Hint: It has something to do with the evaporation of water

http://en.wikipedia.org/wiki/Transpiration
http://en.wikipedia.org/wiki/Phloem