Amniotes posses

Options

A. Metanephric kidneys
B. Mesonephric kidneys
C. Pronephric kidneys
D. Anephric kidneys

Answer

**Step-by-Step Solution:**

1. **Understanding Amniotes**: Amniotes are a group of tetrapod vertebrates that include reptiles, birds, and mammals. They are characterized by the presence of an amniotic egg, which has protective membranes, including the amnion.

2. **Types of Kidneys**: There are three main types of kidneys that can be found in vertebrates:
- Pronephric kidneys: These are the most primitive type and are typically found in early developmental stages of some vertebrates.
- Mesonephric kidneys: These are functional in some adult fish and amphibians but are generally replaced by more advanced kidney types in higher vertebrates.
- Metanephric kidneys: These are the most advanced type and are found in amniotes. They develop from the metanephros, which is derived from the nephrogenic mesoderm.

3. **Identifying the Correct Type of Kidney for Amniotes**: Among the options provided:
- Option 1: Metanephric kidneys – Correct, as amniotes possess these advanced kidneys.
- Option 2: Mesonephric kidneys – Incorrect, as these are typically found in some lower vertebrates and not in amniotes.
- Option 3: Pronephric kidneys – Incorrect, as these are primitive and not present in adult amniotes.
- Option 4: Anephric kidneys – Incorrect, as this term refers to the absence of kidneys.

4. **Conclusion**: Based on the characteristics of amniotes and the types of kidneys they possess, the correct answer is that amniotes possess metanephric kidneys.

**Final Answer**: Amniotes possess metanephric kidneys (Option 1).

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