(ISA) ISA Certified Arborist Practice Test
(ISA) ISA Certified Arborist ISA Tree Biology & Physiology
What is the role of xylem in a tree?
Select your answer
A
Transporting sugars to the leaves
B
Transferring water from roots to leaves
C
Protecting the tree from pests
D
Forming leaves and branches
Need a hint?
(H)
