Choose the Most Appropriate Answer Response for Each Question

Choose the most appropriate answer response for each question.
-sieve tubes

A) responsible for opening and closing of stomata
B) region of a plant where sugars are being used
C) pipelines of the xylem
D) a mutually beneficial association between a fungus and a root
E) structures on roots that house nitrogen-fixing bacteria
F) pipelines of the phloem
G) transparent epidermal secretion that waterproofs leaves
H) facilitate transfer of sugars to the sieve element
I) control the uptake of mineral ions into the vascular cylinder
J) transport of organic molecules from source region to sink
K) the main water-conducting tube in angiosperms