Bacteria are (were) considered more as plants than animals because of the presence of

Options

A. small nucleus
B. plasma membrane
C. cell wall
D. spore formation

Answer

### Step-by-Step Solution:

1. **Understanding Bacteria**: Bacteria are unicellular organisms classified as prokaryotes, meaning they lack a defined nucleus and membrane-bound organelles. They are placed in the Kingdom Monera.

2. **Cell Structure**: The cell structure of bacteria is primitive. They do not have a well-defined nucleus, which is a characteristic feature of eukaryotic cells (like those of plants and animals).

3. **Analyzing the Options**:
- **Option 1: Small nucleus**: This option is incorrect because bacteria do not have a true nucleus; they have a nucleoid region where their genetic material is located.
- **Option 2: Plasma membrane**: While bacteria do have a plasma membrane, this is not a distinguishing feature that aligns them more closely with plants than animals since all cells (including animal cells) have plasma membranes.
- **Option 3: Cell wall**: Bacteria possess a cell wall made of peptidoglycan. This is a significant point of comparison because plants also have a cell wall, which is made of cellulose. In contrast, animal cells do not have a cell wall.

4. **Conclusion**: The presence of a cell wall in bacteria, similar to that in plants, is the reason why bacteria are considered more like plants than animals. Therefore, the correct answer is that bacteria are considered more as plants than animals because of the presence of a cell wall.