Leaves modify into small, sharp-pointed structures in

Options

A. Aloe
B. Citrus
C. Bougainvillea
D. Pistia

Answer

To answer the question, "Leaves modify into small, sharp-pointed structures in which plants?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Leaf Modifications**:
- Leaves can undergo modifications to perform functions other than photosynthesis. This can include becoming tendrils for climbing, storage organs, or sharp structures for protection.

2. **Identifying Plants with Sharp-Pointed Leaf Modifications**:
- We need to identify specific plants where leaves have modified into sharp-pointed structures. The question mentions Aloe, Citrus, Bougainvillea, and Pistea.

3. **Analyzing Each Plant**:
- **Aloe**: Known for its thick, fleshy leaves that often have sharp edges or points. This modification helps protect the plant from herbivores.
- **Citrus**: Typically has leaves that are not sharp-pointed but may have thorns on branches.
- **Bougainvillea**: The plant has modified leaves that are colorful bracts, but the thorns on the branches are sharp.
- **Pistea**: This plant is not commonly known for sharp-pointed leaves.

4. **Conclusion**:
- Among the options provided, **Aloe** is the plant where leaves modify into small, sharp-pointed structures. Bougainvillea also has sharp thorns but primarily has modified bracts.

### Final Answer:
Leaves modify into small, sharp-pointed structures in **Aloe**.