Callus is defines as- A. Differentiated mass of cells B. Undifferentiated mass of cells C. Dedifferentiated mass of cells D. Redifferentiated mass of cells
Option A. Callus is and undifferentiated mass of cells produced generally in tissue culture.It is derived from a source tissue in in vitro conditions ready for tissue culture. So the correct answer is " Undifferentiated mass of cells"
