Phytotron is a device by which

Options

A. electrons are bombarbed
B. protons are liberated
C. plants are grown in controlled environment
D. Mutations are produced in plants

Answer

### Step-by-Step Solution

1. **Understanding the Question**: The question asks about the function of a phytotron. It provides multiple-choice options to select the correct one.

2. **Analyzing the Options**:
- **Option A**: Electrons are bombarded.
- **Option B**: Protons are liberated.
- **Option C**: Plants are grown in a controlled environment.
- **Option D**: Mutations are produced in plants.

3. **Evaluating Each Option**:
- **Option A**: This option is incorrect. Phyotrons do not function by bombarding electrons; this process is typically associated with electrical ionization.
- **Option B**: This option is also incorrect. Protons are liberated in processes like nuclear fusion, not in the context of a phytotron.
- **Option C**: This option is correct. A phytotron is specifically designed to provide a controlled environment for growing plants, allowing researchers to study plant-environment interactions.
- **Option D**: This option is incorrect. While mutations can occur in plants, they are not specifically produced by a phytotron; rather, they can be induced by gamma radiation and other methods.

4. **Conclusion**: Based on the analysis, the correct answer is that a phytotron is a device by which **plants are grown in a controlled environment**.

### Final Answer
Phytotron is a device by which **plants are grown in a controlled environment**.

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