How many vertbrae are present in adult backbone?

Explanation

To answer the question "How many vertebrae are present in the adult backbone?", we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding Vertebrae**:
- Vertebrae are the individual bones that make up the vertebral column (backbone) in vertebrates, which are animals that have a backbone.

2. **Total Number of Vertebrae**:
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