The Question is from neet-botany anatomy-of-flowering-plants dicot-stem, and it was created by the author Mr. NARESH KUMAR K

Question

The interfascicular cambium in dicot stems originates from:

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Plant anatomy, specifically the development of vascular tissues in dicot stems.
 **Related Topics**: Vascular cambium, secondary growth, meristems.
 **Prerequisites**: Understanding of primary and secondary growth in plants, the structure of dicot stems, and the function of different plant tissues.
## SOLUTION PATHWAY
**Given Information**:
  The question asks about the origin of the interfascicular cambium in dicot stems.
  The options are different cell types within the stem.
**Method & Steps**:
 1. Understand the concept of interfascicular cambium.
  Reasoning: The interfascicular cambium is a meristematic tissue that forms between the vascular bundles (fascicles) in dicot stems.  It contributes to the formation of the vascular cambium ring, which is responsible for secondary growth.
 2. Identify the origin of the interfascicular cambium.
  Working: The interfascicular cambium arises from the dedifferentiation of cells in the medullary rays.  These cells reactivate their meristematic potential and begin dividing to form the interfascicular cambium.
  Key Point:  Dedifferentiation refers to the process where mature cells revert to a meristematic state.
 3. Combine the interfascicular and fascicular cambia.
  Result: The interfascicular cambium, along with the fascicular cambium (present within the vascular bundles), forms a continuous vascular cambium ring responsible for secondary growth.
  Verification: This is consistent with the established understanding of dicot stem development and secondary growth.
 ## OPTION ANALYSIS
A :x: Pericycle cells contribute to the formation of the vascular cambium in roots, not stems.
B ✓: Medullary ray cells are the correct source of the interfascicular cambium in dicot stems.
 C :x: Phloem parenchyma cells are part of the phloem tissue but do not directly form the interfascicular cambium.
D :x: Xylem parenchyma cells are part of the xylem tissue and do not directly form the interfascicular cambium.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the origin of the interfascicular cambium with the fascicular cambium (which originates from procambium):  Understanding the distinct origins of these two cambial components is crucial.
  2. Incorrectly associating the pericycle with stem development instead of root development:  The pericycle plays a vital role in root development but not in the formation of the interfascicular cambium in stems.
 **Quick Tips**:
  1.Remember that the vascular cambium is a continuous ring in dicot stems, formed by the combination of fascicular and interfascicular cambium.
  2.Associate medullary rays with their location in the stem, connecting them to the interfascicular cambium's position.

Mr. NARESH KUMAR K · Answer

Pericycle cells

Mr. NARESH KUMAR K · Answer

The correct Option is "Medullary ray cells"

Mr. NARESH KUMAR K · Answer

Phloem parenchyma cells

Mr. NARESH KUMAR K · Answer

Xylem parenchyma cells

NEET Botany Anatomy of Flowering Plants Dicot Stem MCQs

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