The Question is from neet-botany plant-growth-and-development , and it was created by the author B VENKAT

Question

Which region of the plant is primarily responsible for growth in length?

B VENKAT · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Plant growth and meristematic tissues
 **Related Topics**: Apical dominance, primary growth, secondary growth
 **Prerequisites**: Understanding of plant tissues and their functions.
## SOLUTION PATHWAY
**Given Information**:
  The question asks about the plant region responsible for growth in length.
  Options include different types of meristems and a type of plant tissue.
**Method & Steps**:
 1. Identify the types of meristems and their functions.
  Reasoning: Meristems are regions of actively dividing cells responsible for plant growth. Different meristems contribute to different types of growth.
  Formula/Rule: None directly applicable.
 2. Determine which meristem is primarily responsible for growth in length (primary growth).
  Working:  Apical meristems are located at the tips of roots and shoots. Their activity leads to an increase in the length of the plant. Lateral meristems (vascular cambium and cork cambium) contribute to growth in girth (secondary growth). Intercalary meristems are found in grasses and contribute to the growth of leaves and stems between nodes. Parenchyma is a type of ground tissue, not a meristem, so it's not directly involved in growth.
  Key Point:  Primary growth is responsible for the increase in plant length, while secondary growth is responsible for increase in girth (diameter).
 3. Select the correct option based on the understanding of primary growth.
  Result: Apical meristem is the correct answer.
  Verification: The function of apical meristem aligns with the question's focus on growth in length.
 ## OPTION ANALYSIS
A :x: Lateral meristems are responsible for secondary growth (increase in girth), not primary growth (increase in length).
B ✓: Apical meristems are located at the tips of roots and shoots and are responsible for primary growth, leading to an increase in plant length.
C :x: Intercalary meristems contribute to growth in grasses, but not primarily responsible for overall length increase in most plants.
D :x: Parenchyma is a type of ground tissue that provides support and storage, but it doesn't contribute directly to plant growth in the same way as meristems.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing apical and lateral meristems: Remember apical meristems are for length, lateral meristems for girth.
  2.Overlooking the role of apical meristems: Focus on their location at the tips of roots and shoots.
 **Quick Tips**:
  1.Associate 'apical' with 'apex' (tip) to remember its location and function.
  2.Remember 'lateral' means 'side' to associate it with growth in width.

B VENKAT · Answer

Lateral meristem

B VENKAT · Answer

The correct Option is "Apical meristem"

B VENKAT · Answer

Intercalary meristem

B VENKAT · Answer

Parenchyma

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