Green plants produce oxygen which is utilized by all animals. The cell organelle that produces oxygen in a plant cell is the

Options

A. mitochondrion
B. chloroplast
C. vacuole
D. nucleus

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question states that green plants produce oxygen, which is essential for animals. We need to identify the specific cell organelle responsible for this oxygen production in plant cells.

2. **Identifying the Options**: The options provided are:
- a) Mitochondria
- b) Chloroplast
- c) Vacuole
- d) Nucleus

3. **Analyzing Each Option**:
- **Mitochondria**: This organelle is known for its role in cellular respiration, where it helps convert glucose into energy. It does not produce oxygen; instead, it consumes oxygen.
- **Chloroplast**: This organelle is crucial for photosynthesis, the process by which green plants convert sunlight, carbon dioxide, and water into glucose and oxygen. Therefore, chloroplasts are responsible for producing oxygen.
- **Vacuole**: This organelle primarily functions in storage and maintaining water balance within the cell. It does not play a role in oxygen production.
- **Nucleus**: The nucleus is the control center of the cell, regulating cellular activities, but it does not produce oxygen.

4. **Conclusion**: Based on the analysis, the correct answer is **Chloroplast**, as it is the organelle responsible for producing oxygen during photosynthesis in plant cells.

**Final Answer**: The cell organelle that produces oxygen in a plant cell is the **Chloroplast**.

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