Which of these is a defining character of plant?

Options

A. Autotrophic nature
B. Eukaryotic cell structure
C. Cellulosic cell wall
D. Aerobic repiration

Answer

To determine the defining character of plants from the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Options**: The options provided are:
- Autotrophic nature
- Eukaryotic cell structure
- Cellulosic cell wall
- Aerobic respiration

2. **Analyze Each Option**:
- **Autotrophic nature**: This means that plants can produce their own food through photosynthesis. While this is a key characteristic of plants, it is not exclusive to them, as some other organisms also exhibit autotrophy.
- **Eukaryotic cell structure**: Plants are indeed eukaryotic, meaning their cells contain a nucleus and membrane-bound organelles. However, this characteristic is shared with other kingdoms like animals and fungi.
- **Cellulosic cell wall**: Plant cells have cell walls made primarily of cellulose, which is a unique feature that distinguishes them from other organisms. This characteristic is specific to plants and is a defining feature.
- **Aerobic respiration**: While plants do perform aerobic respiration, this is not a defining characteristic, as many organisms (including animals) also undergo aerobic respiration.

3. **Identify the Defining Character**: Among the options, the cellulosic cell wall is the most defining characteristic of plants. This feature is unique to the plant kingdom and plays a crucial role in their structure and function.

4. **Conclusion**: Therefore, the correct answer to the question "Which of these is a defining character of plant?" is **cellulosic cell wall**.

### Final Answer:
The defining character of plants is the **cellulosic cell wall**.

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