What is a callus?

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(D) In plant tissue culture,a callus is defined as an unorganized mass of undifferentiated cells that proliferate from an explant (a piece of plant ti

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An unorganized mass of undifferentiated cells.

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(D) In plant tissue culture,a callus is defined as an unorganized mass of undifferentiated cells that proliferate from an explant (a piece of plant tissue) when cultured on a nutrient medium. These cells are actively dividing but have not yet specialized into specific plant tissues or organs. Under appropriate hormonal conditions,the callus can be induced to differentiate into shoots,roots,or somatic embryos.

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