The Question is from neet-botany anatomy-of-flowering-plants meristems, and it was created by the author B VENKAT

Question

The concept of 'Dedifferentiation' in relation to meristem formation is best exemplified by:

B VENKAT · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Dedifferentiation in plant development
 **Related Topics**: Meristems, cell differentiation, parenchyma, cambium, plant tissues
 **Prerequisites**: Understanding of plant cell types, meristematic tissues, and the process of cell differentiation.
## SOLUTION PATHWAY
**Given Information**:
The question asks for the best example of dedifferentiation in relation to meristem formation.
**Method & Steps**:
1. **Understanding Dedifferentiation**: Dedifferentiation is the process by which differentiated cells revert to a meristematic state, regaining the ability to divide and differentiate into various cell types.  This is crucial for plant growth and repair.
2. **Analyzing the Options**:
    * **A. Activity of the root apical meristem:** This is the normal activity of a meristem, not an example of dedifferentiation.  The cells are already meristematic.
    * **B. Formation of interfascicular cambium from parenchyma cells:** Parenchyma cells are differentiated cells.  The formation of the interfascicular cambium from these cells involves them losing their specialized characteristics and becoming meristematic again. This is a clear example of dedifferentiation.
    * **C. Development of phellogen from the epidermis:** While the epidermis gives rise to the phellogen (cork cambium), this is more of a lateral meristem formation from a pre-existing tissue, rather than a clear example of differentiated cells reverting to a meristematic state like parenchyma cells do.
    * **D. Differentiation of xylem vessels from procambium:** This is the opposite of dedifferentiation; it's the process of differentiation.
3. **Conclusion**: The formation of interfascicular cambium from parenchyma cells best exemplifies dedifferentiation because differentiated parenchyma cells revert to a meristematic state.
  Result: B
  Verification: The definition of dedifferentiation directly applies to option B.
 ## OPTION ANALYSIS
A :x:  The root apical meristem is already a meristem; no dedifferentiation occurs.
B ✓:  Parenchyma cells are differentiated; their conversion to interfascicular cambium is dedifferentiation.
C :x: Phellogen formation is a type of meristem formation, but not strictly dedifferentiation of already differentiated cells in the same way as option B.
D :x: This describes differentiation, the opposite process.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing differentiation and dedifferentiation: Remember that differentiation is the process of cells becoming specialized, while dedifferentiation is the reverse.
  2.Overlooking the specific cell types involved: Pay close attention to the starting and ending cell types in each option.
 **Quick Tips**:
  1.Focus on the reversal of cell specialization.
  2.Remember that meristems are regions of actively dividing cells.

B VENKAT · Answer

Activity of the root apical meristem

B VENKAT · Answer

The correct Option is "Formation of interfascicular cambium from parenchyma cells"

B VENKAT · Answer

Development of phellogen from the epidermis

B VENKAT · Answer

Differentiation of xylem vessels from procambium

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