Heterophylly shown by the following plants is the best example for plasticity

Options

A. Larkspur and Buttercup
B. Cotton and Hibiscus
C. Coriander and Helianthus.
D. Hibiscus and Datura

Answer

To answer the question regarding which plants exhibit heterophylly as the best example of plasticity, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Heterophylly**:
- Heterophylly refers to the phenomenon where a single plant exhibits different types of leaves at different stages of its life cycle or in response to environmental conditions.

2. **Understanding Plasticity**:
- Plasticity in plants is the ability to change their morphology or physiology in response to varying environmental conditions. This includes the development of different leaf shapes or structures based on factors like water availability, light, and age.

3. **Identifying Examples of Heterophylly**:
- We need to analyze the given options:
- Larkspur and Buttercup
- Cotton and Hibiscus
- Coriander and Helianthus
- Hibiscus and Datura

4. **Evaluating Each Pair**:
- **Larkspur and Buttercup**: Both of these plants show heterophylly. For instance, Buttercup can have different leaf shapes in water versus air.
- **Cotton and Hibiscus**: While both can show some variation, they are not the best examples of heterophylly.
- **Coriander and Helianthus**: These plants do not prominently exhibit heterophylly.
- **Hibiscus and Datura**: Neither of these plants is known for heterophylly.

5. **Selecting the Best Example**:
- Based on the analysis, Larkspur and Buttercup are the best examples of heterophylly and thus plasticity. They exhibit different leaf forms based on environmental conditions.

6. **Conclusion**:
- Therefore, the correct answer to the question is **Larkspur and Buttercup**.