Which of the following is incorrect?

Options

A. Regulators- show homeostasis
B. Conformers - cannot maintain homeostasis
C. Partial regulators - have an ability to regulate upto limited range
D. Conformers - show homeostasis

Answer

To solve the question regarding which statement is incorrect, we will analyze the definitions and characteristics of regulators, conformers, and partial regulators in terms of their ability to maintain homeostasis.

### Step-by-Step Solution:

1. **Understanding Regulators**:
- Regulators are organisms that can maintain their internal body temperature regardless of the external environmental conditions.
- Examples include mammals and birds, which are also referred to as homeotherms.

**Hint**: Remember that regulators maintain a stable internal environment.

2. **Understanding Conformers**:
- Conformers are organisms that cannot maintain their internal body temperature and instead, their body temperature varies with the environment.
- An example of conformers includes reptiles like lizards, which are also known as poikilotherms.

**Hint**: Conformers adapt to environmental changes rather than maintaining a constant internal state.

3. **Understanding Partial Regulators**:
- Partial regulators can maintain their body temperature but only within a certain range. Beyond that range, they cannot regulate their temperature effectively.
- An example of a partial regulator is the ground squirrel.

**Hint**: Partial regulators have limits to their temperature regulation abilities.

4. **Analyzing the Statements**:
- **Statement 1**: Regulators show homeostasis.
- This statement is correct because regulators maintain a stable internal environment.
- **Statement 2**: Conformers cannot maintain homeostasis.
- This statement is also correct as conformers do not maintain a stable internal temperature.
- **Statement 3**: Partial regulators have an ability to regulate up to a limited range.
- This statement is correct since partial regulators can regulate their temperature but only within specific limits.
- **Statement 4**: Conformers show homeostasis.
- This statement is incorrect because conformers do not maintain a constant internal environment; they conform to the external conditions.

5. **Conclusion**:
- The incorrect statement among the options provided is that "conformers show homeostasis."

### Final Answer:
The incorrect statement is: **Conformers show homeostasis.**