Bacteria differ from plants in that they do not have

Options

A. DNA
B. RNA
C. Cell wall
D. A well defined nucleus.

Answer

**Step-by-Step Solution:**

1. **Identify the Key Differences**: Start by understanding the fundamental differences between bacteria and plants. Bacteria are prokaryotic organisms, while plants are eukaryotic. This distinction is crucial in answering the question.

2. **Understand Prokaryotic Characteristics**: Prokaryotic organisms, such as bacteria, do not have a well-defined nucleus. Instead, their genetic material (DNA) is located in a region called the nucleoid, which is not membrane-bound.

3. **Examine the Genetic Material**: Bacteria contain both DNA and RNA. DNA serves as their genetic material, and RNA is involved in protein synthesis. Therefore, options suggesting that bacteria lack DNA or RNA are incorrect.

4. **Consider the Cell Wall**: Bacteria possess a cell wall, which provides structural support and protection. This is different from plant cells, which also have a cell wall made of cellulose. Thus, the option stating that bacteria do not have a cell wall is also incorrect.

5. **Identify the Correct Option**: The only characteristic that distinguishes bacteria from plants in this context is the absence of a well-defined nucleus. Plants have a true nucleus that is membrane-bound, while bacteria do not.

6. **Conclusion**: Based on the analysis, the correct answer to the question is that bacteria differ from plants in that they do not have a well-defined nucleus.

**Final Answer**: D) A well-defined nucleus.

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