Proplastids form

Options

A. Leucoplasts
B. Chromoplasts
C. Chloroplasts
D. All

Answer

### Step-by-Step Solution:

1. **Definition of Proplastids**: Proplastids are the precursor forms of plastids in plant cells. They are undifferentiated and can develop into various types of plastids depending on the cell's needs.

2. **Types of Plastids**: Proplastids can differentiate into three main types of plastids:
- **Leucoplasts**: These are colorless plastids that do not contain pigments. They are primarily involved in the storage of starch, oils, and proteins.
- **Chromoplasts**: These plastids contain pigments (such as carotenoids) that give color to fruits and flowers. They play a role in attracting pollinators and seed dispersers.
- **Chloroplasts**: These are green plastids that contain chlorophyll, the pigment essential for photosynthesis. Chloroplasts are crucial for converting light energy into chemical energy.

3. **Conclusion**: Since proplastids can develop into leucoplasts, chromoplasts, and chloroplasts, the correct answer is that proplastids form all of these types of plastids.

### Final Answer:
Proplastids form leucoplasts, chromoplasts, and chloroplasts.

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