Which is poikilothermic animal :-

Options

A. Tortoise
B. Pigeon
C. Penguin
D. Whale

Answer

To determine which is a poikilothermic animal, we need to understand what poikilothermic means. Poikilothermic animals, also known as cold-blooded animals, are those whose internal body temperature varies according to the temperature of their environment.

### Step-by-Step Solution:

1. **Understand Poikilothermic Animals**:
- Poikilothermic animals cannot regulate their body temperature internally. Their body temperature changes with the ambient temperature.

2. **Analyze the Options**:
- **Option 1: Tortoise**:
- Tortoises are reptiles and are known to be poikilothermic. Their body temperature fluctuates with the environment.
- **Option 2: Peasants**:
- Peasants (likely referring to pheasants) are birds and are warm-blooded (endothermic), meaning they maintain a constant body temperature.
- **Option 3: Penguins**:
- Penguins are also birds and are warm-blooded. They can maintain their body temperature despite the cold environment.
- **Option 4: Whale**:
- Whales are mammals and are warm-blooded as well. They maintain a constant body temperature.

3. **Identify the Correct Answer**:
- From the analysis, the only animal that is poikilothermic is the **Tortoise** (Option 1). The other options (Peasants, Penguins, and Whales) are warm-blooded animals.

### Final Answer:
The poikilothermic animal from the given options is **Tortoise**.