Roots 2

Question 1

what keeps water in the tree trunk

Answer 1

cohesion and adhesion

Question 2

Cohesion

Answer 2

bond between water molecules keeps the water column from breaking apart

Question 3

adhesion

Answer 3

bond of water molecules to the xylem cell walls helps overcome gravitational force

Question 4

capillary action

Answer 4

how water is pulled up a xylem tube through columns of water cells that are bound together and as 1 molecule is pulled up, it pulls the other behind it

Question 5

transpiration

Answer 5

the evaporative loss of water from aerial parts of the plant

Question 6

how does transpiration occur

Answer 6

evaporation of water in the stomata exerts negative pressure on the water columns in the xylem, pulling water up the stem
no energy is required from the plant

Question 7

what is tension

Answer 7

negative pressure

Question 8

how is opening and closing of the guard cells linked to photosynthesis

Answer 8

blue light activates a signal that turns on plasma membrane proton pump and causes starch to be converted to malic acid. solutes accumulate in the vacuole and increase turgor pressure

Question 9

in what direction does transport into the phloem move

Answer 9

moves from source tissues to sink tissues

Question 10

what is water and sugar movement in the phloem caused by

Answer 10

pressure flow

Question 11

phloem loading

Answer 11

sugars from photosynthetic leaves or storage organs are pumped into the phloem using ATP for energy

Question 12

phloem unloading

Answer 12

sugars are transported out of the phloem and metabolized

Question 13

sink

Answer 13

areas of low pressure

Question 14

where does water come from in phloem transport

Answer 14

drawn into the cells from the apoplast

Question 15

what happens to the sucrose in phloem transport

Answer 15

either oxidized to produce energy or stored as starch or other storage compounds