Which of the following is a difference between
movement in the xylem and movement in the
phloem?
a. movement in the phloem is by a pushing
action; movement in the xylem is by a
pulling action
b. movement in the phloem occurs through
nucleated cells; movement in the xylem
occurs through non-nucleated cells
c. movement in the phloem is always down;
movement in the xylem is always up
d. movement in the phloem starts in the roots;
movement in the xylem starts in the leaves
e. all of these are differences between
movement in the xylem and movement in
the phloem
A
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