Which of the following pair of hormones are required for a callus to differentiate? A. Auxin and cytokinin B. Auxin and ethylene C. Auxin and abscisic acid D. Cytokinin and gibberlin
Option A.Explanation :- Callus is an unorganised mass of cells. These cells are formed from dedifferentiation. Callus undergoes redifferentiation to form specialised cells of shops. Factory growth controllers, similar as auxins and cytokinins are supplemented into the medium to initiate callus conformation or physical embryogenesis.
