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#Question id: 37893


Tracheary element differentiation is considered an irreversible process. What is the primary cytological reason for this? 

#Plant Biotechnology
  1. The formation of a secondary cell wall. 
  2. The loss of nuclei and cytoplasm. 
  3. The permanent arrest of the cell cycle in the G1 phase. 
  4. The accumulation of lignin.

Answer:- Option(s): 2


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