Find odd one w.r.t. photosynthetic moneran :

Options

A. Anabaena
B. Nostoc
C. Vibrio
D. Both `(1)` and `(2)`

Answer

To find the odd one out with respect to photosynthetic monerans, we need to analyze the characteristics of the given options. Here’s a step-by-step solution:

### Step 1: Understand Photosynthetic Monerans
Photosynthetic monerans are prokaryotic organisms, meaning they lack a well-defined nucleus and are typically unicellular. They can be autotrophic (able to produce their own food through photosynthesis) or heterotrophic (relying on other organisms for food).

**Hint:** Remember that photosynthetic monerans possess chlorophyll a, which is essential for photosynthesis.

### Step 2: Identify Common Examples
Common examples of photosynthetic monerans include Nostoc and Anabaena. Both of these organisms are capable of photosynthesis and can fix atmospheric nitrogen in specialized cells called heterocysts.

**Hint:** Look for organisms that have the ability to perform photosynthesis and fix nitrogen.

### Step 3: Analyze the Options
When given options, we need to identify which one does not fit the characteristics of photosynthetic monerans. In this case, we have:
1. Nostoc
2. Anabaena
3. [Another photosynthetic moneran]
4. Vibrio

**Hint:** Compare each option to see if they are autotrophic or heterotrophic.

### Step 4: Identify the Odd One Out
- **Nostoc and Anabaena** are photosynthetic and can fix nitrogen.
- **Vibrio**, on the other hand, is a facultative anaerobic organism that is heterotrophic, meaning it cannot produce its own food and relies on other organisms.

**Hint:** Focus on the nutritional mode of each organism to determine which one is different.

### Step 5: Conclusion
Based on the analysis, **Vibrio** is the odd one out with respect to photosynthetic monerans because it is heterotrophic and does not perform photosynthesis.

**Final Answer:** Vibrio is the odd one out.