Give the name of two mature eukaryotic cells that lack nucleus:-

Answer

To answer the question "Give the name of two mature eukaryotic cells that lack nucleus," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for two specific types of mature eukaryotic cells that do not have a nucleus.

2. **Identify Eukaryotic Cells**: Eukaryotic cells are characterized by having membrane-bound organelles, including a nucleus. However, some mature eukaryotic cells lose their nucleus during their development.

3. **Identify Examples**:
- **Human Red Blood Cells (RBCs)**: Mature human red blood cells, also known as erythrocytes, lack a nucleus. This adaptation allows them to carry more hemoglobin and, consequently, more oxygen.
- **Sieve Tube Cells**: These are specialized cells found in the phloem of vascular plants. Sieve tube cells also lack a nucleus and ribosomes, relying on companion cells for their functions.

4. **Conclusion**: The two mature eukaryotic cells that lack a nucleus are:
- Human Red Blood Cells (RBCs)
- Sieve Tube Cells

### Final Answer:
The two mature eukaryotic cells that lack a nucleus are:
1. Human Red Blood Cells (RBCs)
2. Sieve Tube Cells

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