Differentiate between Bulb and tuber

Explanation

### Step-by-Step Solution:

**Step 1: Definition of Bulb and Tuber**
- A bulb is a modified underground storage organ consisting of a short stem surrounded by fleshy leaves that store nutrients. An example of a bulb is the onion.
- A tuber is a swollen underground stem that serves as a storage organ for nutrients. An example of a tuber is the potato.

**Step 2: Number of Structures**
- Bulbs are typically singular; each plant usually has one bulb.
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