Bacteria responsible for nitrification comes under

Options

A. Cocus
B. Vibrio
C. Bacillus
D. Spirilla

Answer

To answer the question "Bacteria responsible for nitrification comes under," we need to identify the correct group of bacteria involved in the nitrification process. Here’s a step-by-step solution:

### Step 1: Understand Nitrification
Nitrification is a biological process that involves the oxidation of ammonia (NH₃) into nitrites (NO₂⁻) and then into nitrates (NO₃⁻). This process is crucial in the nitrogen cycle and is primarily carried out by specific types of bacteria.

**Hint for Step 1:** Remember that nitrification involves the conversion of ammonia to nitrites and then to nitrates.

### Step 2: Identify the Types of Bacteria Involved
The bacteria responsible for nitrification are typically divided into two main groups:
1. **Ammonia-oxidizing bacteria (AOB)** - These bacteria convert ammonia into nitrites.
2. **Nitrite-oxidizing bacteria (NOB)** - These bacteria convert nitrites into nitrates.

**Hint for Step 2:** Focus on the specific types of bacteria that play a role in the nitrification process.

### Step 3: Analyze the Options Given
From the options provided:
- **Coccus**: These are spherical bacteria and are not primarily involved in nitrification.
- **Vibrio**: These are curved rod-shaped bacteria, often associated with foodborne illnesses, not nitrification.
- **Bacillus**: This group includes various rod-shaped bacteria, some of which can be involved in nitrification.
- **Spirula**: These are spiral-shaped bacteria and are not known for nitrification.

**Hint for Step 3:** Eliminate the options that do not relate to the nitrification process.

### Step 4: Determine the Correct Answer
Among the options, **Bacillus** is the most relevant group associated with the nitrification process. While not all Bacillus species are involved in nitrification, some can play a role in the nitrogen cycle.

**Hint for Step 4:** Consider the characteristics of Bacillus and its role in the nitrogen cycle.

### Final Answer
The bacteria responsible for nitrification come under **Bacillus**.