Which one of the following is a wrong statement?

Options

A. Nucleus encloses DNA that determines the characters of all living organisms.
B. Organisms coming under kingdom monera lack a well-defined nucleus.
C. Linnaeus classified animals into different groups according to their habitat.
D. Aristotle classified plants into three groups based on the stem.

Explanation

To determine which statement is incorrect, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Analyze Option A:**
- Statement: "Nucleus encloses DNA that determines the character of all living organisms."
- Explanation: This statement is correct. The nucleus contains DNA, which carries genetic information that determines the traits of living organisms.

2. **Analyze Option B:**
- Statement: "Organisms come under Kingdom Monera like a well-developed defined nucleus."
- Explanation: This statement is incorrect. Organisms in Kingdom Monera, such as bacteria, do not have a well-defined nucleus; they are prokaryotic cells. Therefore, this statement is wrong.

3. **Analyze Option C:**
- Statement: "Linnaeus classified animals into different groups according to their habitat."
- Explanation: This statement is misleading. While Linnaeus did classify organisms, his classification was primarily based on physical characteristics rather than habitat. However, it is not entirely wrong as habitat can be a factor in classification.

4. **Analyze Option D:**
- Statement: "Aristotle classified plants into three groups based on their stems."
- Explanation: This statement is correct. Aristotle classified plants into three groups: herbs, shrubs, and trees, based on their stems.

### Conclusion:
The wrong statement among the options is **Option B**, as organisms in Kingdom Monera do not have a well-defined nucleus.

### Final Answer:
**Option B is the wrong statement.**

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