Question

Callus is

• A. Tissue that forms embryo
• B. An insoluble carbohydrate
• C. Tissue that grows to form embryoid
• D. Unorganised actively dividing mass of cells maintained in culture

Answer 1

Answer: (D)

Unorganised actively dividing mass of cells maintained in culture

Callus is unorganized actively dividing the mass of cells maintained in culture. It has a meristematic cell which has ample amount of cytoplasm to trigger cell division. It is treated with the growth hormones to allow the cell division and differentiation. Callus when treated with auxin it promotes rooting and when it is treated with cytokinin it stimulates cell maturation, differentiation and finally, promotes the development of stem.

So, the correct answer is option D.