When potassium ion is transported into guard cells, water:
a) enters by osmosis.
b) is actively transported out of the cells.
c) moves to the edge of the cell.
d) leaves by osmosis.
e) is actively transported into the cells.
1 Answer
_____ is responsible for the movement of sugars from leaves to taproots; _____ is responsible for the movements of sugar from taproots to leaves.
a) Bulk flow … bulk flow
b) Bulk flow … root pressure
c) Root pressure … bulk flow
d) Bulk flow … transpiration
e) Transpiration … transpiration
1 Answer
In a sugar sink, such as a taproot, sugar is converted into _____.
a) glycogen
b) cellulose
c) fatty acids
d) starch
e) proteins
1 Answer
At a sugar sink, sugar is removed from phloem by _____.
a) osmosis
b) root pressure
c) active transport
d) diffusion
e) transpiration
1 Answer
Water moves into phloem by _____.
a) osmosis
b) endocytosis
c) root pressure
d) active transport
e) transpiration
1 Answer
The water pressure that pushes water and sugar from sugar source to sugar sink is referred to as _____.
a) translocation
b) transpiration
c) bulk flow
d) solute pressure
e) root pressure
1 Answer
Sugar moves from leaves into the _____ of _____ by _____.
a) sieve-tube members … xylem … active transport
b) tracheids … phloem … diffusion
c) tracheids … phloem … active transport
d) sieve-tube members … phloem … active transport
e) sieve-tube members … phloem … diffusion
1 Answer
_____ transport(s) sugars from leaves to, for example, taproots.
a) Blood vessels
b) Tracheids
c) Vessel elements
d) Xylem
e) Phloem
1 Answer
Which of these processes is responsible for leaves being considered sugar sources?
a) catabolism
b) Krebs cycle
c) photosynthesis
d) citric acid cycle
e) glycolysis
1 Answer
Tree roots are a ________ of sugars in spring and a ________ in the fall.
a) source; source
b) sink; sink
c) sink; source
d) source; sink
1 Answer
