Birds and Mammals have `:-`

Options

A. Regulators
B. Conformers
C. Cold blooded
D. Ectotherm

Answer

**Step-by-Step Solution:**

1. **Identify the Organisms**: The question asks about birds and mammals. Both of these groups belong to the class of animals known as endotherms or warm-blooded animals.

2. **Understanding Regulators**: Birds and mammals are classified as regulators because they have the ability to maintain internal stability (homeostasis) despite external environmental changes.

3. **Homeostasis**: Homeostasis refers to the physiological processes that organisms use to maintain a stable internal environment. This includes regulating body temperature, osmotic concentration, and other vital parameters.

4. **Physiological and Behavioral Means**: Birds and mammals utilize both physiological mechanisms (like sweating, shivering, and metabolic adjustments) and behavioral adaptations (like seeking shade or sunbathing) to maintain homeostasis.

5. **Examples of Homeostasis**:
- In hot weather, humans sweat to cool down through evaporative cooling.
- In cold weather, humans shiver to generate heat through muscle activity.

6. **Conclusion**: Therefore, the answer to the question is that birds and mammals are **regulators** because they can maintain homeostasis through various physiological and behavioral means.

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