Releation between bacteria and legume having nodulated roots is that of

Options

A. Hots-parasitism
B. Commensalism
C. Symbiosis
D. Epiphytism

Answer

To solve the question regarding the relationship between bacteria and legumes having nodulated roots, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Components**:
- Identify the two main components involved: legumes (specifically those with nodulated roots) and bacteria (specifically Rhizobium).

2. **Identifying the Type of Roots**:
- Recognize that nodulated roots are characteristic of leguminous plants, which form nodules on their roots.

3. **Role of Rhizobium Bacteria**:
- Understand that Rhizobium bacteria inhabit these nodules and play a crucial role in nitrogen fixation. They convert atmospheric nitrogen into ammonia, which is a form that plants can utilize.

4. **Defining the Relationship**:
- Analyze the nature of the interaction between the legumes and Rhizobium. This interaction is mutually beneficial: the plant provides carbohydrates and a suitable environment for the bacteria, while the bacteria provide essential nitrogen compounds to the plant.

5. **Choosing the Correct Term**:
- Based on the mutual benefit derived from this interaction, we can categorize this relationship as "symbiosis". This is distinct from other types of relationships such as parasitism, commensalism, or epiphytism.

6. **Final Answer**:
- Conclude that the relationship between bacteria (Rhizobium) and legumes with nodulated roots is best described as **symbiosis**.

### Final Answer:
The correct answer is **symbiosis**.