Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: The root is covered at the apex by a thimble-like structure called the root cap.
Reason R: Root cap bears lateral roots of several orders.
In the light of the above statements, choose the correct answer from the options given below:
A is true but R is false.
— Concept: This question tests your understanding of the structure and function of the root cap in plants.Concept: This question tests your understanding of the structure and function of the root cap in plants.
Why (A) is correct:
- Assertion A is true: The root cap is indeed a thimble-like structure that covers the root apex. Its primary function is to protect the delicate meristematic cells of the root tip as it pushes through the soil.
- Reason R is false: The root cap does not bear lateral roots. Lateral roots originate from the pericycle, a layer of cells located deep within the root, and emerge through the cortex and epidermis. The root cap is solely for protection.
Why other options are wrong:
- (B) A is false but R is true: Incorrect, as A is true and R is false.
- (C) Both A and R are true and R is the correct explanation of A: Incorrect, as R is false.
- (D) Both A and R are true but R is NOT the correct explanation of A: Incorrect, as R is false.
Common Mistake: Students might confuse the origin of lateral roots with the function of the root cap, or assume the root cap has a role in root branching.
NEET Tip: Remember that the root cap is like a 'helmet' for the root tip, protecting it from abrasion. Lateral roots are formed internally from the pericycle.
Correct Answer: (A)
A is true but R is false.