Chemistry NEET Full Syllabus Mock Test 180 Question New Syllabus Mock Test - 2 PCB Single Correct MCQ
Published on: August 13, 2026

Cells of tracheary elements (tracheids and vessels) become dead at maturity and lose their protoplasm due to the deposition of lignocellulosic cell wall thickenings. This is an example of:

A
Growth
B
Differentiation
C
Dedifferentiation
D
Redifferentiation

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The correct answer is:
B

During differentiation, cells undergo few to major structural changes both in their cell wall and protoplasm. For example to form a tracheary element, the cells would lose their protoplasm. They also develop, a very strong, elastic lignocellulosic secondary cell walls, to carry water to long distances even under extreme tensions.

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