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

Question

The secondary xylem and phloem in a dicot stem are produced by which of the following?

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Secondary growth in plants
 **Related Topics**: Vascular cambium, xylem, phloem, dicot stem anatomy
 **Prerequisites**: Understanding of plant tissues and their functions.
## SOLUTION PATHWAY
**Given Information**:
  The question asks about the origin of secondary xylem and phloem in a dicot stem.
**Method & Steps**:
 1. Identify the tissue responsible for secondary growth in dicot stems.
  Reasoning: Secondary growth, which leads to an increase in stem girth, is a characteristic of dicots and is driven by the vascular cambium.
  Formula/Rule: N/A
 2. Recall the function of the vascular cambium.
  Working: The vascular cambium is a lateral meristem that produces secondary xylem towards the inside and secondary phloem towards the outside.
  Key Point: Apical meristems are responsible for primary growth (increase in length), while cork cambium produces periderm (protective outer layer).
 3. Determine the correct answer.
  Result: The vascular cambium produces secondary xylem and phloem.
  Verification: This aligns with the established understanding of plant anatomy and secondary growth.
 ## OPTION ANALYSIS
A :x: Apical meristem is responsible for primary growth (length).
B ✓: Vascular cambium is responsible for secondary growth (girth), producing secondary xylem and phloem.
C :x: Cork cambium produces the periderm (bark).
D :x: Intercalary meristem is found in monocots and is responsible for growth at the nodes.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing apical and vascular cambium: Remember apical meristems contribute to primary growth (length), while vascular cambium contributes to secondary growth (girth).
  2.Overlooking the function of cork cambium: Cork cambium produces the periderm, not secondary xylem and phloem.
 **Quick Tips**:
  1.Associate vascular cambium with secondary growth and girth increase in dicot stems.
  2.Remember the acronym VASCULAR CAMBIUM to easily recall its function.

Mr. NARESH KUMAR K · Answer

Apical meristem

Mr. NARESH KUMAR K · Answer

The correct Option is "Vascular cambium"

Mr. NARESH KUMAR K · Answer

Cork cambium

Mr. NARESH KUMAR K · Answer

Intercalary meristem

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