Life to a biologist is essentially physico-chemical.

Answer

**Step-by-Step Solution:**

1. **Understanding the Statement**: The statement "Life to a biologist is essentially physico-chemical" suggests that the study of life involves both physical and chemical processes.

2. **Defining a Biologist**: A biologist is someone who specializes in the study of living organisms and their vital processes. This includes understanding how these organisms function at both the physical and chemical levels.

3. **Interdisciplinary Nature of Biology**: Biology is not an isolated field; it overlaps with other scientific disciplines. When physics is combined with biology, it forms a new field called biophysics. Similarly, the combination of chemistry and biology leads to biochemistry.

4. **Examples of Physics in Biology**:
- The mechanics of muscles and body movements are governed by physical laws.
- Fluid mechanics is crucial for understanding blood circulation and air flow in the respiratory system.

5. **Examples of Chemistry in Biology**:
- All living organisms are composed of molecules, which are made up of atoms.
- These atoms combine to form essential biological molecules such as proteins, carbohydrates, lipids, and nucleic acids.

6. **Conclusion**: Since biology encompasses both physical and chemical aspects of life, the statement that "Life to a biologist is essentially physico-chemical" is true.

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