What would have happened if our backbone had only long instead of many vertebrae?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Backbone Structure**: The human backbone, or vertebral column, is made up of 33 individual bones called vertebrae. These vertebrae are stacked on top of each other to form a flexible structure.

2. **Hypothetical Scenario**: If our backbone consisted of only one long vertebra instead of multiple vertebrae, it would mean that there would be no joints or flexibility in the spine.

3. **Loss of Movement**: With a single long vertebra, the backbone would become immovable. This immobility would restrict all types of movement, including bending forward, backward, or sideways.

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