A) root apex
B) shoot apex
C) parenchyma
D) collenchyma as
Correct Answer: A
Solution :
Quiescent centre is present in root apex. Quiescent centre concept was proposed by clowes (1961). He found a reservoir of cells having low DNa, RNA and protein concentration in root apex. These cells do not divide but may become active or they can made to divide. Due to its inactivity, the quiescent centre is resistant to damages.
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