Structural Organisation In Animals Question 208
Question: A mature sieve tube differs from vessel in [DPMT 1982]
Options:
A) Being nearly dead
B) Lacking cytoplasm
C) Lacking a functional nucleus
D) Absence of lignified walls
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Answer:
Correct Answer: D
Solution:
The walls of vessels are lignified and hard and not very thick.
Sieve tubes have thin cellulose walls.