The living organisms of all hierarchial levels share in common, which one of the following features?

Options

A. Nature of protoplasmic constituent
B. Method of cell division
C. Degree of body organization
D. Mode of nutrition

Answer

To solve the question regarding the common features shared by living organisms at all hierarchical levels, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Hierarchical Levels**: Recognize that living organisms are classified into various hierarchical levels such as Kingdom, Division, Class, Order, Family, Genus, and Species. Each level represents a different category in the biological classification system.

2. **Identifying Common Features**: Consider the features that might be common across all these levels. This includes aspects like cellular structure, modes of nutrition, and methods of reproduction.

3. **Evaluating Options**:
- **Nature of Protoplasmic Constituent**: While all living organisms have protoplasm, the composition can vary significantly across different groups.
- **Method of Cell Division**: Different organisms may use mitosis or meiosis, which is not a common feature.
- **Degree of Body Organization**: This varies widely from unicellular organisms to complex multicellular organisms.
- **Mode of Nutrition**: This can differ significantly between plants (autotrophic) and animals (heterotrophic).

4. **Conclusion**: The most common feature shared by all living organisms at different hierarchical levels is their **mode of nutrition**. This is because, regardless of the classification, all organisms require a way to obtain energy and nutrients, whether they are autotrophic or heterotrophic.

### Final Answer:
The living organisms of all hierarchical levels share in common their **mode of nutrition**.