The term phytochrome was introduced by

Options

A. Borthwick and Hendricks
B. Bothwick
C. Moore
D. Garner and Allard.

Answer

### Step-by-Step Solution:

1. **Understanding Phytochrome**: Phytochrome is a type of photoreceptor found in plants and certain bacteria that is sensitive to light. It plays a crucial role in detecting light and regulating various plant responses.

2. **Identifying the Discoverers**: The question asks who introduced the term "phytochrome." It is important to note that while phytochrome was discovered by scientists, the term itself was coined by others.

3. **Analyzing the Options**: The options provided are:
- A) Borthwick and Hendricks
- B) Borthwick
- C) Moore
- D) Garner and Arnold

4. **Correct Identification**:
- Harry Borthwick and Sterling Hendricks are credited with the discovery of phytochrome.
- However, the name "phytochrome" was introduced by scientists Garner and Allard.

5. **Conclusion**: The correct answer to the question "The term phytochrome was introduced by" is **Borthwick and Hendricks**.

### Final Answer:
The term phytochrome was introduced by **Borthwick and Hendricks**.

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