The Question is from neet-botany , and it was created by the author Mr. NARESH KUMAR K

Question

Which of the following statements regarding the anomalous secondary growth in *Boerhaavia* is INCORRECT?

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
	**Primary Concept**: Anomalous Secondary Growth
	**Related Topics**: Secondary growth, vascular bundles, cambium, *Boerhaavia*
	**Prerequisites**: Understanding of normal secondary growth and variations in different plant species.
## SOLUTION PATHWAY
**Given Information**:
	The question asks about the INCORRECT statement related to anomalous secondary growth in *Boerhaavia*.
**Method & Steps**:
	1. **Recall the characteristics of anomalous secondary growth in *Boerhaavia*.**
		Reasoning: *Boerhaavia* exhibits a specific type of anomalous secondary growth.
	2. **Analyze each option based on the known features.**
		Working:  *Boerhaavia* is known for its successive rings of cambia outside the vascular bundles, leading to concentric rings of secondary vascular bundles. The vascular bundles in *Boerhaavia* are inverted, with phloem facing inwards and xylem outwards.
	3. **Identify the statement that doesn't align with the features of *Boerhaavia*.**
		Result: Medullary bundles are not a characteristic feature of *Boerhaavia*'s anomalous secondary growth.
		Verification:  The presence of medullary bundles is not associated with the anomalous secondary growth pattern observed in *Boerhaavia*.
## OPTION ANALYSIS
[A] ✓: A variant of cambium outside the vascular bundles is a correct characteristic of *Boerhaavia*.  The anomalous secondary growth involves the formation of successive rings of extrafascicular cambium.
[B] ✓: Concentric rings of secondary vascular bundles are a key feature of anomalous secondary growth in *Boerhaavia*.  These rings are formed due to the activity of the successive cambia.
[C] :x: Presence of medullary bundles is incorrect. Medullary bundles are vascular bundles present in the pith region. *Boerhaavia* does not have medullary bundles. 
[D] ✓: Inverted vascular bundles are characteristic of *Boerhaavia*. The phloem is located towards the center, and the xylem is located towards the periphery.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing anomalous secondary growth patterns: Different plants exhibit variations in anomalous secondary growth. It's important to learn the specific features of each type.
		2. Not understanding the anatomical terms:  Clear understanding of terms like medullary bundles, vascular bundles, cambium, etc., is crucial.
	**Quick Tips**:
		1. Visualize the cross-section of *Boerhaavia* stem to understand the arrangement of vascular tissues and cambia.
		2. Remember that 'anomalous' means deviating from the normal, so expect variations in the typical secondary growth pattern.

Mr. NARESH KUMAR K · Answer

A variant of cambium outside the vascular bundles

Mr. NARESH KUMAR K · Answer

Concentric rings of secondary vascular bundles

Mr. NARESH KUMAR K · Answer

The correct Option is "Presence of medullary bundles"

Mr. NARESH KUMAR K · Answer

Inverted vascular bundles

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