First slide

Secondary Growth

Question

Statement A: Primary medullary rays belong to ground tissue system
Statement B: Secondary medullary rays belong to vascular tissue system.

Moderate

A

Both statements A and B are correct
B

Both statements A and B are incorrect
C

Statement A is correct and B is incorrect.
D

Statement A is incorrect and B is correct.

Solution

Primary medullary rays are present in primary structure of dicot stem and they belong to ground tissue system. Secondary medullary rays are present in the secondary vascular tissues and formed from vascular cambium ray initials.

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