The basic unit of a vertebrate kidney is the :

Options

A. ureter
B. malpighian tubule
C. nephron
D. flame cell

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question:** The question asks for the basic unit of a vertebrate kidney. We need to identify which of the given options is considered the fundamental unit of the kidney's structure and function.

2. **Analyzing the Options:**
- **Ureter:** This is a tube that carries urine from the kidneys to the bladder, but it is not a structural unit of the kidney itself.
- **Malpighian Tubules:** These are excretory structures found in insects and some other invertebrates, not vertebrates.
- **Nephron:** This is the functional and structural unit of the kidney in vertebrates. Each kidney contains approximately 1 to 2 million nephrons.
- **Flame Cells:** These are excretory cells found in flatworms, not in vertebrates.

3. **Identifying the Correct Answer:** Since the nephron is the only option that is a fundamental unit of the vertebrate kidney, we conclude that the correct answer is **nephron**.

4. **Final Answer:** The basic unit of a vertebrate kidney is the **nephron**.

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