The Question is from neet-botany , and it was created by the author D VINOD

Question

Which part of the stem is responsible for the primary growth of a plant?

D VINOD · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
 **Primary Concept**: Plant growth and development
 **Related Topics**: Meristematic tissues, apical dominance, primary and secondary growth
 **Prerequisites**: Basic understanding of plant anatomy and cell division.
## SOLUTION PATHWAY
**Given Information**:
The question asks about the part of the stem responsible for primary growth.
**Method & Steps**:
 1. Identify the types of meristems in plants.
  Reasoning: Plants have different types of meristems responsible for different growth patterns.  Apical meristems are located at the tips of roots and shoots, while lateral meristems are responsible for secondary growth (increase in girth).
  Formula/Rule: None directly applicable.
 2. Determine the role of each meristem type.
  Working: Apical meristems are responsible for primary growth, leading to an increase in length. Lateral meristems (vascular cambium and cork cambium) are responsible for secondary growth, increasing stem girth. Intercalary meristems are found in grasses and contribute to the elongation of internodes.  Cork cambium is part of the periderm, involved in secondary growth.
  Key Point: Primary growth is the increase in length of roots and stems.
 3. Identify the meristem responsible for primary growth.
  Result: Apical meristem is responsible for primary growth.
  Verification: This aligns with the established knowledge of plant growth and development.
 ## OPTION ANALYSIS
A ✓: Apical meristem is correctly identified as the site of primary growth in plants.  It's located at the tips of roots and shoots and produces cells that elongate, leading to an increase in plant height.
B :x: Lateral meristems are responsible for secondary growth (increase in girth), not primary growth.
C :x: Intercalary meristems contribute to growth in grasses, but are not the primary site of growth in most plants.
D :x: Cork cambium contributes to the formation of the bark and is associated with secondary growth, not primary growth.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing primary and secondary growth: Remembering that primary growth is about lengthening and secondary growth is about widening.
  2.Misidentifying meristem locations:  Knowing that apical meristems are at the tips and lateral meristems are in the vascular cylinder.
 **Quick Tips**:
  1.Think of 'apical' as 'top' or 'tip' to remember its location and function.
  2.Use mnemonics to remember the different meristem types and their roles.

D VINOD · Answer

The correct Option is "Apical meristem"

D VINOD · Answer

Lateral meristem

D VINOD · Answer

Intercalary meristem

D VINOD · Answer

Cork cambium

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