The Question is from neet-botany anatomy-of-flowering-plants , and it was created by the author K SURESH KUMAR

Question

During secondary growth in dicot roots, which tissue initiates the formation of the vascular cambium?

K SURESH KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: [Option D]
## CONCEPT FRAMEWORK
	**Primary Concept**: Vascular cambium formation in dicot roots.
	**Related Topics**: Secondary growth, plant tissue types, cambium function.
	**Prerequisites**: Understanding of plant anatomy and growth processes.
## SOLUTION PATHWAY
**Given Information**:
		- Dicot roots undergo secondary growth.
		- The vascular cambium is crucial for secondary growth.
**Method & Steps**:
	1. Identify the tissues involved in the formation of the vascular cambium.
		Reasoning: The vascular cambium arises from specific types of cells in the root.
		Formula/Rule: Cambium is formed from the pericycle and adjacent tissues.
	2. Analyze the tissue types in the root structure.
		Working: The innermost layer of the cortex, pericycle, and conjunctive parenchyma are examined.
		Key Point: The pericycle and conjunctive parenchyma contribute to cambium formation.
	3. Conclude which option correctly identifies the source of the vascular cambium.
		Result: The vascular cambium is formed partly from the pericycle and partly from the conjunctive parenchyma.
		Verification: This is consistent with plant growth literature and observations.
 ## OPTION ANALYSIS
[A] :x: The innermost layer of the cortex does not contribute to cambium formation.
[B] :x: The pericycle cells opposite to the protoxylem poles are not sufficient alone to form the cambium.
[C] :x: The pith parenchyma cells do not play a role in cambium formation in dicot roots.
[D] ✓: Partly from the pericycle and partly from the conjunctive parenchyma cells lying just below the phloem bundles: This correctly describes the source of the vascular cambium.
 ## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing the roles of different tissues in secondary growth: Focus on how each tissue contributes to cambium formation.
		2. Misidentifying the location of cambium formation: Remember that it involves specific layers adjacent to vascular bundles.
	**Quick Tips**:
		1. Visualize the root structure to better understand tissue roles.
		2. Recall that cambium is essential for the secondary growth process, connecting vascular tissues.

K SURESH KUMAR · Answer

The innermost layer of the cortex

K SURESH KUMAR · Answer

The pericycle cells opposite to the protoxylem poles

K SURESH KUMAR · Answer

The pith parenchyma cells

K SURESH KUMAR · Answer

The correct Option is "Partly from the pericycle and partly from the conjunctive parenchyma cells lying just below the phloem bundles"

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