Leaves are modified into spines in

Options

A. Nepenthes
B. Opuntia
C. Australian Acacia
D. Utricularia

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about a plant in which leaves are modified into spines. This indicates a specific adaptation in certain plants.

2. **Identifying the Purpose of Modification**: Leaves can be modified into spines for two main reasons:
- To deter herbivores from eating the plant (providing protection).
- To reduce water loss, especially in arid environments, where broad leaves would lead to excessive transpiration.

3. **Analyzing the Options**:
- **Option A: Nepenthes**: This plant is known for its pitcher-shaped leaves, not spines.
- **Option B: Opuntia**: This is a cactus species that is well-known for having spines instead of leaves.
- **Option C: Australian Acacia**: The leaves of this plant are typically not modified into spines.
- **Option D: Eutrichularia**: This plant does not have spines; it has other types of leaf modifications.

4. **Conclusion**: Based on the analysis, the plant that has modified its leaves into spines is **Opuntia**. This adaptation is beneficial for survival in arid regions.

5. **Final Answer**: The correct answer is **Option B: Opuntia**.

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