Larkspur, Ranunculus and Cotton plants are similar by showing

Options

A. developmental heterophylly
B. plasticity
C. environmental heterophylly.
D. homospory

Answer

To answer the question regarding the similarity between Larkspur, Ranunculus, and Cotton plants, we will analyze the options and the characteristics of these plants step by step.

### Step-by-Step Solution:

1. **Understanding the Terms**:
- **Developmental Heterophilia**: This refers to the phenomenon where plants produce different types of leaves at different stages of their life cycle.
- **Plasticity**: This is the ability of a plant to change its form or function in response to environmental conditions or developmental stages.
- **Environmental Heterophilia**: This is the change in plant morphology in response to environmental conditions.
- **Homospory**: This refers to the production of spores of one type only, which is not applicable to the plants mentioned.

2. **Analyzing Larkspur and Cotton**:
- Both Larkspur and Cotton exhibit **developmental heterophilia**, where the juvenile leaves differ in shape from the mature leaves. This indicates that they have the ability to adapt their leaf structures as they grow.

3. **Analyzing Ranunculus**:
- Ranunculus (buttercup) demonstrates **environmental heterophilia**. It produces different leaf shapes depending on whether it is submerged in water or growing in air. This shows its adaptability to environmental conditions.

4. **Comparing the Plants**:
- While Larkspur and Cotton show developmental heterophilia, Ranunculus shows environmental heterophilia. However, all three plants exhibit a form of adaptability to their environment or developmental stages.

5. **Conclusion**:
- The most encompassing similarity among Larkspur, Ranunculus, and Cotton is **plasticity**. This term captures the overall ability of these plants to adapt their structures in response to different developmental stages or environmental conditions.

### Final Answer:
The correct answer is **B. Plasticity**.