Each Sieve Element is Associated with a Living _____________

Question

Each sieve element is associated with a living _____________.  
A) root nodule
B) sieve tubes
C) guard cell
D) sieve elements
E) companion cell

Accepted Answer

Sieve elements are non-living cells that are responsible for transporting sugar and other organic molecules throughout the plant. They are associated with companion cells, which are living cells that provide metabolic support and energy to the sieve elements. Therefore, the correct answer is E) companion cell.