Question

Assertion (A): To generate only a part of the plant from a cell is totipotency.
Reason (R): Suitable special nutrient media and sterile conditions are required in ‘in vitro’ conditions for the division of cells in explants.

• A. Both (A) and (R) are true and (R) is the correct explanation of (A).
• B. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
• C. (A) is true, but (R) is false.
• D. (A) is false, but (R) is true.

Hint:

Totipotency is the capacity of a cell to regenerate into a whole plant, while in vitro conditions provide the environment needed for such growth.

Answer 1

The Correct Option is B

Step 1: Totipotency refers to the ability of a single plant cell to regenerate into an entire plant — so Assertion is true.
Step 2: Reason is also true as sterile conditions and nutrient media are needed for in vitro culture.
Step 3: However, the Reason does not directly explain the definition of totipotency. Therefore, option (B) is correct.