Cold blooded animal with a single circulation is

Options

A. Fish
B. Ampibian
C. Reptile
D. All the abovse

Answer

To solve the question "Cold blooded animal with a single circulation is:", we can follow these steps:

### Step 1: Understand the Terms
- **Cold-blooded animals**: These are animals whose body temperature varies with the temperature of their environment. They are also known as ectothermic animals.
- **Single circulation**: This refers to a circulatory system where blood passes through the heart only once during each complete circuit of the body.

### Step 2: Identify the Options
The options given are:
- A) Fish
- B) Amphibian
- C) Reptile
- D) All of the above

### Step 3: Analyze Each Option
- **Fish**: Fish are cold-blooded and have a single circulatory system. Blood flows from the heart to the gills (where it gets oxygenated) and then directly to the rest of the body.

- **Amphibians**: Amphibians (like frogs) are cold-blooded, but they have a double circulatory system. They have a heart with three chambers, which allows for both pulmonary and systemic circulation.

- **Reptiles**: Reptiles are also cold-blooded, but they typically have a three-chambered heart (except for crocodiles, which have a four-chambered heart) and a double circulatory system.

### Step 4: Determine the Correct Answer
Based on the analysis:
- Only fish are cold-blooded animals with a single circulatory system.

### Conclusion
The correct answer is **A) Fish**.

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