Question

What happen when meristem ceases to divide

Answer 1

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If the meristems ceases to divide in living plants when they get differentiated into permanent tissues and attain specific functions.
They also stop dividing during unfavourable conditions and senescence of a plant. 

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Answer 2

If the meristems ceases to divide in living plants when they get differentiated into permanent tissues and attain specific functions.
They also stop dividing during unfavourable conditions and senescence of a plant.