Name three cell constituents of plant cells which are bounded by double membranes.

Explanation

To answer the question, "Name three cell constituents of plant cells which are bounded by double membranes," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Cell Constituents**: We need to identify the structures within plant cells that are surrounded by double membranes.

2. **List the First Constituent - Nucleus**:
- The nucleus is the first cell constituent that is bounded by a double membrane.
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