Nomenclature is very must in taxonomy which of the following is not correct about scientific nomenclature?

Options

A. They ensure that each organisms has only one name
B. They also ensure that such a name has not been used for any other known organism
C. Scientific nomenclature is a standardised naming system
D. Different countries of the world use different kinds of scientific nomenclature system

Answer

To determine which statement about scientific nomenclature is not correct, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understand the Purpose of Nomenclature**:
- Nomenclature in taxonomy is essential for providing a unique name to each organism, which helps in avoiding confusion in scientific communication.

2. **Evaluate Each Statement**:
- **Statement 1**: "They ensure that each organism has only one name."
- This statement is correct because scientific nomenclature aims to assign a single, unique name to each organism to avoid ambiguity.

- **Statement 2**: "They also ensure that such a name has not been used for any other known organism."
- This statement is also correct as scientific nomenclature follows rules to ensure that names are unique and not duplicated across different organisms.

- **Statement 3**: "Scientific nomenclature is a standardized naming system."
- This statement is correct as scientific nomenclature follows standardized rules, such as those set by the International Code of Nomenclature.

- **Statement 4**: "Different countries of the world use different kinds of scientific nomenclature system."
- This statement is incorrect. Scientific nomenclature is standardized globally, meaning that all countries use the same naming conventions for organisms. This ensures consistency and universality in naming.

3. **Identify the Incorrect Statement**:
- The statement that is not correct about scientific nomenclature is: "Different countries of the world use different kinds of scientific nomenclature system."

### Final Answer:
The incorrect statement about scientific nomenclature is: "Different countries of the world use different kinds of scientific nomenclature system."

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