Ask Doubt
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 On the tip of the root, the apical meristem forms the ________, which prevents the meristem from being worn away as it pushes through the soil.
– cortex
– root cap
– epidermis
– endodermis
– pericycle
1 Answer Under the influence of hormones, branch roots emerge from the ________ of a growing root.
– central cylinder
– endodermis
– epidermis
– Casparian strip
– pericycle
1 Answer The location of the pericyle is best described as:
– the outermost layer of the vascular cylinder.
– just beneath the epidermis.
– adjacent to the apical meristem.
– lining the cells of the endodermis.
– between layers of primary xylem and primary phloem.
1 Answer
BNO Team
BNO Team
BNO Team
BNO Team
BNO Team
BNO Team
BNO Team