pith parenchyma generally lacks

Options

A. Vacuole
B. Chloroplasts
C. Mitochondria
D. Nucleus

Answer

### Step-by-Step Solution:

1. **Understanding Pith Parenchyma**:
- Pith parenchyma is a type of tissue found in the central part of stems and roots of flowering plants. It is primarily composed of parenchyma cells.

2. **Identifying Characteristics of Pith Parenchyma**:
- Pith parenchyma cells are generally thin-walled and play a significant role in the storage of food and other substances.

3. **Analyzing the Options**:
- The question provides four options regarding what pith parenchyma generally lacks:
- **Option 1**: Vacuole
- **Option 2**: Chloroplast
- **Option 3**: Mitochondria
- **Option 4**: Nucleus

4. **Evaluating Each Option**:
- **Vacuole**: Pith parenchyma cells typically contain vacuoles, which are important for storage and maintaining cell turgor.
- **Chloroplast**: Pith parenchyma generally lacks chloroplasts, as this tissue is not involved in photosynthesis.
- **Mitochondria**: Mitochondria are present in most plant cells, including pith parenchyma, as they are essential for cellular respiration.
- **Nucleus**: Pith parenchyma cells do contain a nucleus, as it is a fundamental component of eukaryotic cells.

5. **Conclusion**:
- Based on the analysis, the correct answer is that pith parenchyma generally lacks **chloroplasts**.

### Final Answer:
Pith parenchyma generally lacks **chloroplasts**.

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