xylem and phloem Flashcards
1
Q
what is xylem made of
A
dead tissue
2
Q
properties of xylem
A
waterproof+hollow
3
Q
xylem transport
A
water+minerals FROM THE ROOTS, enters via osmosis
4
Q
cohesion
A
H2O evaporates, concentration of the solution increases, osmosis occurs from nearest xylem. H2O bonded with weak hydrogen
5
Q
tension
A
H2O leaves, more H2O pulled up, evaporation pulls H2O upwards, gravity pulls downwards
6
Q
adhesion
A
H2O sticks to the sides of xylem vessels stops column breaking
7
Q
symplast system
A
transported via cytoplasm of root cells-has to cross membrane
8
Q
apoplast system
A
through cell walls+gaps between cells- no membranes
9
Q
phloem is made of
A
sugars+organic compounds
10
Q
translocation
A
the movement of carbohydrates, occurs in sieve tube
11
Q
whatdo companion cells do
A
actively transport sugar into tube
