In which plant only two curved hooks are formed on seeds

Options

A. Xanthium
B. Martynia
C. Tribulus
D. Ricinus

Answer

To solve the question "In which plant only two curved hooks are formed on seeds?", we will analyze the options provided and identify the correct answer step by step.

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a plant that has seeds with only two curved hooks. We need to examine the options given: Xanthium, Martinia, Tribulus, and Ricinus.

2. **Analyze Each Option**:
- **Xanthium**: Known as rough cocklebur, Xanthium seeds have multiple tiny hooks all over their surface. Therefore, this option does not meet the criteria of having only two curved hooks.
- **Martinia**: Commonly referred to as cat's claw or tiger's claw, Martinia seeds are characterized by having exactly two curved hooks at the front. This matches the requirement of the question.
- **Tribulus**: Known as noxious weed, Tribulus seeds have long sharp spines and multiple hooks, which again does not satisfy the condition of having only two curved hooks.
- **Ricinus**: Commonly known as the castor oil plant, Ricinus seeds are spinous and do not have the specific characteristic of only two curved hooks.

3. **Identify the Correct Answer**: Based on the analysis, the only plant that has seeds with exactly two curved hooks is **Martinia**.

4. **Conclusion**: Therefore, the correct answer to the question is **Martinia**.