A nutritionally wild type organism ,which does not require any additional growth supplement is known as :

Options

A. Holotype
B. Auxotroph
C. Prototroph
D. Phenotype

Answer

To solve the question, "A nutritionally wild type organism, which does not require any additional growth supplement is known as:", we will analyze the provided options step by step.

### Step-by-Step Solution:

1. **Understanding the Terms**:
- **Holotype**: This term is generally used in taxonomy to refer to a single physical example of an organism, which is used to describe a species. It does not relate to nutritional requirements.
- **Auxotroph**: This is a mutant organism that requires additional nutrients that the wild type does not need. Auxotrophs cannot synthesize certain compounds necessary for growth due to the lack of specific enzymes.
- **Prototroph**: This is a wild type organism that can synthesize all the compounds it needs for growth from basic inorganic materials. It does not require any additional growth supplements.
- **Phenotype**: This term refers to the observable characteristics of an organism, which can be influenced by genetics and environment. It does not specifically relate to nutritional requirements.

2. **Identifying the Correct Answer**:
- Given that the question specifies an organism that does not require any additional growth supplements, we can eliminate **auxotroph** since it requires supplements.
- The term **prototroph** fits perfectly as it describes an organism that can synthesize all necessary compounds from inorganic sources without needing supplements.

3. **Conclusion**:
- Therefore, the correct answer is **Prototroph**.

### Final Answer:
**Prototroph**