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
Root hairs develop from the:
– Casparian strip.
– pericycle.
– cortex.
– endodermis.
– epidermis.
1 Answer
Most of a carrot, a root adapted for carbohydrate storage, is:
– endodermis.
– phloem.
– xylem.
– pericycle.
– cortex.
1 Answer
In leaves, chloroplasts are found in _____.
– xylem
– palisade mesophyll
– phloem
– cuticle
1 Answer
