Question

The Quiescent centre in root apex is defined correctly by which of the following? A. group of relatively inactive cells B. group of inactive cells that never divide C. group of infrequently dividing cells D. lies between protoderm and procambium E. derived from hypophysis of embryo. Choose the correct answer from the options given below:

• A. A and E only
• B. A, C and E only
• C. A and C only
• D. B, D and E only

Hint:

QC cells are relatively inactive and divide infrequently (not 'never'); correct statements are A, C and E.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:

• We must pick the statements that correctly define the quiescent centre (QC) of the root apex.

Step 2: Detailed Explanation:

• A. The QC is a group of relatively inactive cells - correct.

• B. It is not made of cells that never divide; the cells divide infrequently, so B is incorrect.

• C. A group of infrequently dividing cells - correct.

• D. The QC lies in the centre of the root meristem, not between protoderm and procambium, so D is incorrect.

• E. Derived from the hypophysis of the embryo - correct as per the key.

• Correct statements: A, C and E only.

Step 3: Final Answer:
The correct option is (B) A, C and E only.