Question

the tissue grows into an undifferentiated unorganised mass called ?

Answer 1

It is called meristematic tissue.

The tissues used to initiate callus formation depends on plant species and which tissues are available for explant culture. The cells that give rise to callus and somatic embryos usually undergo rapid division or are partially undifferentiated such as meristematic tissue.

Answer 2

namaste kavya

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When a tissue grows into an undifferentiated unorganised mass then it is termed as callus.

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peace.