The similarity between cyanobacterum and bacterum is

Options

A. Presence of flagella
B. Presence of 80 S ribosomes
C. Presence of nucleoid
D. None of these.

Answer

To determine the similarity between cyanobacterium and bacterium, let's analyze the provided options step by step:

### Step 1: Understand the Organisms
Cyanobacteria and bacteria are both classified as prokaryotic organisms. This means they lack a true nucleus and membrane-bound organelles.

### Step 2: Evaluate the Options
1. **Presence of Flagella**:
- Cyanobacteria do not possess flagella, while some bacteria do. Therefore, this option is incorrect.

2. **Presence of 70S Ribosomes**:
- Both cyanobacteria and bacteria are prokaryotes, and they both contain 70S ribosomes. However, the option states "ATS ribosomes," which seems to be a typographical error. Assuming it refers to 70S ribosomes, this option could be considered correct. However, the wording makes it unclear.

3. **Presence of Nucleoid**:
- Both cyanobacteria and bacteria have a nucleoid, which is an irregularly shaped region in prokaryotic cells that contains their genetic material. This is a significant similarity.

4. **None of These**:
- Since we have identified a similarity in the presence of the nucleoid, this option is incorrect.

### Conclusion
The most accurate similarity between cyanobacterium and bacterium is the presence of a nucleoid.

### Final Answer
The similarity between cyanobacterium and bacterium is the **presence of nucleoid**.

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