Which of the following statements hold true for the root system shown in the given figure?
(i) It is a fibrous root system.
(ii) The branches that arise from the main root are called fibrous roots.
(iii) It is a tap root system.
(iv) Examples of this type of root system are pea, tulsi, radish, carrot and turnip.
Which of the following statements hold true for the root system shown in the given figure?
(i) It is a fibrous root system.
(ii) The branches that arise from the main root are called fibrous roots.
(iii) It is a tap root system.
(iv) Examples of this type of root system are pea, tulsi, radish, carrot and turnip.
The correct option is C (iii) and (iv) only
Concept applied: The root system consisting of primary root that develops from the radicle part of the embryo and gives off lateral roots is called a tap root system.
Correct answer: Option C
The explanation for correct option:
Option C
(iii) The given figure is showing the tap root system because there is a presence of a primary root giving off lateral roots. Hence, the statement is true.
(iv) The roots of pea, tulsi, radish, carrot, and turnip are examples of tap root system, as they have a primary root that grows vertically downwards and lateral roots branching off from the primary root. Hence, the statement is true.
Explanation for incorrect options:
Option A
(i) Fibrous root system has a cluster of thread-like roots emerging from the base of the stem which is not evident in the figure. Hence, the given statement is false.
(iii) The given figure shows a prominent main root from which thread-like lateral roots are emerging, depicting a tap root system. Hence, the given statement is true.
Option B
(ii) The branches that arise from the main or primary root are called lateral roots and not fibrous roots, hence the given statement is false.
(iv) The roots of pea, tulsi, radish. carrot and turnip are examples of a tap root system as they have a primary root that grows vertically downwards and gives off lateral roots. Hence, the given statement is true.
Option D
(ii) Lateral branches arise from the main or primary root. Hence, the given statement is false.
(iii) A tap root system includes a primary root from which thread-like lateral roots emerge as shown in the given figure. Hence, the given statement is true.
Conclusion:
- The given figure demonstrates a tap root system.
- Tap roots penetrate deep in the soil and provide strong anchorage to the plant.
- Pea, tulsi, radish. carrot and turnip are examples of plants that have a tap root system.
- Tap roots are commonly found in dicot plants.
The correct option is C (iii) and (iv) only
Concept applied: The root system consisting of primary root that develops from the radicle part of the embryo and gives off lateral roots is called a tap root system.
Correct answer: Option C
The explanation for correct option:
Option C
(iii) The given figure is showing the tap root system because there is a presence of a primary root giving off lateral roots. Hence, the statement is true.
(iv) The roots of pea, tulsi, radish, carrot, and turnip are examples of tap root system, as they have a primary root that grows vertically downwards and lateral roots branching off from the primary root. Hence, the statement is true.
Explanation for incorrect options:
Option A
(i) Fibrous root system has a cluster of thread-like roots emerging from the base of the stem which is not evident in the figure. Hence, the given statement is false.
(iii) The given figure shows a prominent main root from which thread-like lateral roots are emerging, depicting a tap root system. Hence, the given statement is true.
Option B
(ii) The branches that arise from the main or primary root are called lateral roots and not fibrous roots, hence the given statement is false.
(iv) The roots of pea, tulsi, radish. carrot and turnip are examples of a tap root system as they have a primary root that grows vertically downwards and gives off lateral roots. Hence, the given statement is true.
Option D
(ii) Lateral branches arise from the main or primary root. Hence, the given statement is false.
(iii) A tap root system includes a primary root from which thread-like lateral roots emerge as shown in the given figure. Hence, the given statement is true.
Conclusion:
- The given figure demonstrates a tap root system.
- Tap roots penetrate deep in the soil and provide strong anchorage to the plant.
- Pea, tulsi, radish. carrot and turnip are examples of plants that have a tap root system.
- Tap roots are commonly found in dicot plants.
