The lowest level of organization of life is called _________

Options

A. cellular level
B. tissue level
C. organiism level
D. organelle level

Answer

The lowest level of organization of life is called **cellular level**.

### Step-by-Step Solution:

1. **Understanding Levels of Organization**: Life is organized into different levels, starting from the smallest unit to the most complex. The basic levels include cells, tissues, organs, and organisms.

2. **Identifying the Smallest Unit**: Among these levels, the smallest unit is the cell. Cells are the fundamental building blocks of all living organisms.

3. **Defining a Cell**: A cell is defined as the basic unit of life. All living organisms are composed of one or more cells.

4. **Moving Up the Hierarchy**: After cells, when multiple cells work together to perform a specific function, they form a tissue. Tissues then combine to form organs, and organs work together in organ systems to create a complete organism.

5. **Conclusion**: Since the question asks for the lowest level of organization of life, the answer is the cellular level, as it is the foundational unit from which all higher levels of organization are built.