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Question 27.01:

1)What are the structural characteristics of meristematic cells near root tip? 

2)What are the structural characteristics of the cells in the elongation zone of the root?
 


Solution

Meristematic cells near root tip-  The cells of this region are called Root Apical Meristerms (RAM) and are in active state of division, thus their number increases continously. The cells of this region are thin walled with dense cytoplasm and large nucleus. They have the ability to divide and self perpetuate.

The cells in the elongation zone of the root This region is situated just above the meristematic zone. In the cells of this zone, a large number of small vacuoles develop and later these vacuoles fuse to form one large central vacuole filled with cell sap. The cells are elongated in this region.


Biology
NCERT Exemplar
Standard XI

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