All the chemical energy transformations that occur within a cell is called :

Options

A. metabolism
B. adaptation
C. homeostasis
D. photosynthesis

Explanation

To solve the question "All the chemical energy transformations that occur within a cell is called:", we will analyze the options provided and identify the correct term that describes the process of chemical energy transformation within cells.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the term that encompasses all chemical energy transformations occurring within a cell.

2. **Analyzing the Options**:
- **Metabolism**: This term refers to the sum of all chemical reactions that occur within a cell, including those that break down substances to release energy and those that synthesize new compounds.
- **Adaptation**: This is the process by which organisms adjust to their environment. It does not specifically refer to chemical energy transformations.
- **Homeostasis**: This term describes the ability of an organism to maintain stable internal conditions. It is not directly related to chemical energy transformations.
- **Photosynthesis**: This is a specific process where light energy is converted into chemical energy by plants. It does not encompass all cellular chemical transformations.

3. **Identifying the Correct Answer**:
- Since metabolism includes all chemical reactions and energy transformations within a cell, it is the most appropriate term for the question.
- The other options (adaptation, homeostasis, photosynthesis) do not cover the full scope of chemical energy transformations within cells.

4. **Conclusion**: The correct answer is **Metabolism**.

### Final Answer:
The term that describes all the chemical energy transformations that occur within a cell is **Metabolism**.

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