Which of the following is enucleate

Options

A. Squamous epithelial cell
B. Mature human erythrocyte
C. Mature human leucocyte
D. Mature frog erythrocyte

Answer

To determine which of the following cells is enucleate, we need to understand the definition of enucleate and analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Enucleate**:
- Enucleate refers to cells that do not contain a nucleus.

2. **Analyzing the Options**:
- **Squamous Epithelial Cell**:
- These cells are part of the epithelial tissue and always contain a nucleus. Therefore, this option is not enucleate.
- **Mature Human Erythrocyte**:
- Human red blood cells (RBCs) lose their nucleus during maturation to maximize space for hemoglobin, which allows for more efficient oxygen transport. Thus, mature human erythrocytes are enucleate.
- **Mature Human Leukocyte**:
- White blood cells (WBCs), or leukocytes, retain their nucleus throughout their life cycle. Therefore, this option is not enucleate.
- **Mature Frog Erythrocyte**:
- Unlike human erythrocytes, frog erythrocytes retain their nucleus even when mature. Thus, this option is also not enucleate.

3. **Conclusion**:
- The only enucleate cell among the options provided is the **Mature Human Erythrocyte**.

### Final Answer:
The cell that is enucleate is the **Mature Human Erythrocyte**.

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