Which type of kidneys are found in amphibians?

Options

A. Holonephric
B. Mesonephric
C. Pronephric
D. Metanephric

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the type of kidneys found in amphibians. This requires knowledge of amphibian anatomy and their excretory systems.

2. **Identifying Kidney Types**: There are four types of kidneys mentioned:
- A) Pronephric
- B) Mesonephric
- C) Metanephric
- D) None of the above

3. **Analyzing Each Type**:
- **Pronephric Kidneys**: These are the most primitive type of kidneys, typically found in some fish and larval stages of amphibians.
- **Mesonephric Kidneys**: These are the functional kidneys in adult amphibians and some fish. They develop from the mesonephros, which is the middle part of the kidney development process.
- **Metanephric Kidneys**: These are the advanced type of kidneys found in mammals, including humans.
- **None of the Above**: This option is not applicable since one of the types is indeed found in amphibians.

4. **Conclusion**: Based on the analysis, the type of kidneys found in amphibians is **Mesonephric**.

5. **Explanation of Mesonephric Kidneys**: Mesonephric kidneys are composed of numerous functional units called nephrons. Each nephron has a glomerulus for filtering blood and tubules for reabsorbing necessary substances and excreting waste.

### Final Answer:
The type of kidneys found in amphibians is **Mesonephric**.

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