Define the terms 'cell' and 'cell biology'.

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Cell:**
- A cell is defined as the fundamental and structural unit of life. It is the smallest unit that can carry out all the processes necessary for life. Cells form the basic building blocks of all living organisms, whether they are unicellular (like bacteria) or multicellular (like plants and animals).

2. **Importance of Cells:**
- Cells are crucial because they provide structure to the organism and are responsible for various functions such as metabolism, energy production, and reproduction. They are often referred to as the "powerful structure" of living beings due to their essential roles.

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