A monocot can be distinguished from a dicot by :-

Options

A. Aestivation
B. Venation
C. Both (1) & (2)
D. Placentation

Answer

To distinguish a monocot from a dicot, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Monocots and Dicots**:
- Monocots (monocotyledons) are plants that have one cotyledon (seed leaf) in their seeds.
- Dicots (dicotyledons) have two cotyledons in their seeds.

2. **Identifying Key Characteristics**:
- There are several characteristics that differentiate monocots from dicots, including leaf venation, flower parts, and root systems.

3. **Focusing on Venation**:
- One of the most distinctive features is the pattern of leaf venation.
- In monocots, the leaf veins are usually parallel. This means that the major veins run alongside each other from the base to the tip of the leaf.
- In dicots, the leaf veins form a network or a branching pattern, known as reticulate venation.

4. **Evaluating Other Characteristics**:
- While other characteristics like estivation (arrangement of floral parts) and placentation (arrangement of ovules within the ovary) can also differ, they are not as definitive as venation for distinguishing between monocots and dicots.
- For example, estivation can be similar in both groups, and placentation can vary widely within each group.

5. **Conclusion**:
- Therefore, the most reliable way to distinguish a monocot from a dicot is by examining the leaf venation. Monocots exhibit parallel venation, while dicots exhibit reticulate venation.

### Final Answer:
A monocot can be distinguished from a dicot by venation.

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