Distinction of Prokaryota and eukaryota is mainly based on

Options

A. Nucleus only
B. Cell organelles only
C. Chromosomes only
D. All the above.

Answer

To answer the question regarding the distinction between Prokaryota and Eukaryota, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Prokaryotes**:
- Prokaryotes are unicellular organisms that lack a true nucleus. Their genetic material is not enclosed within a membrane.
- They do not have membrane-bound organelles such as mitochondria or chloroplasts.
- The chromosomes in prokaryotes are typically circular.

2. **Understanding Eukaryotes**:
- Eukaryotes can be unicellular or multicellular and possess a true nucleus where the genetic material is enclosed within a nuclear membrane.
- They have various membrane-bound organelles, including mitochondria, endoplasmic reticulum, Golgi apparatus, and chloroplasts in plants.
- The chromosomes in eukaryotes are usually linear and associated with histone proteins.

3. **Key Differences**:
- The primary distinction between prokaryotes and eukaryotes includes:
- Presence or absence of a nucleus.
- Presence or absence of membrane-bound organelles.
- Structure of chromosomes (circular in prokaryotes vs. linear in eukaryotes).

4. **Conclusion**:
- The distinction of Prokaryota and Eukaryota is based on multiple factors: the presence of a nucleus, the presence of cell organelles, and the structure of chromosomes.
- Therefore, the correct answer to the question is **"all of the above"**.

### Final Answer:
The distinction of Prokaryota and Eukaryota is mainly based on **all of the above** (nucleus, cell organelles, and chromosomes).

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