Monocot root is not characterised by

Options

A. Polyarch condition
B. Exarch xylem
C. Well developed medulla
D. Secondary growth

Answer

To determine which characteristic is not associated with monocot roots, we can analyze the options provided in the question. Here’s a step-by-step breakdown:

### Step 1: Understand the Characteristics of Monocot Roots
Monocot roots have specific features that differentiate them from dicot roots. Key characteristics include:
- Presence of multiple xylem bundles (more than six).
- Polyarch condition (more than six xylem strands).
- Well-developed pith (medulla).
- Absence of secondary growth.

### Step 2: Analyze the Options
Now, let's analyze the options given in the question:
1. **Polyarch condition**: This is a characteristic of monocot roots, as they typically have more than six xylem bundles.
2. **Exact xylem**: This refers to the arrangement of xylem in monocots, which is also a characteristic feature.
3. **Well-developed medulla**: Monocot roots have a well-developed pith or medulla.
4. **Secondary growth**: Monocot roots do not exhibit secondary growth due to the absence of cambium.

### Step 3: Identify the Correct Answer
Based on the analysis:
- The characteristic that is **not** associated with monocot roots is **secondary growth**. This is because monocots lack cambium, which is necessary for secondary growth.

### Final Answer
Monocot root is not characterized by **secondary growth**.

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