A Scientist Has Taken a Cross Section from a Conifer

Multiple Choice

A scientist has taken a cross section from a conifer. He notices a small nucleus contained within a lignified cell wall. This cell is MOST likely:

A) a mature tracheid cell.
B) an immature tracheid cell.
C) a mature sieve element cell.
D) an immature sieve element cell.
E) either a mature tracheid cell or a mature sieve element cell.