Why and how is bacterium Thermus aquaticus employed in recombinant DNA technology?

Explanation

### Step-by-Step Solution

1. **Introduction to Thermus aquaticus**:
- Thermus aquaticus is a thermophilic bacterium that thrives in high-temperature environments, such as hot springs.

2. **Source of DNA Polymerase**:
- From Thermus aquaticus, an enzyme known as Taq polymerase (or TAC polymerase) is extracted. This enzyme plays a crucial role in DNA replication and amplification.

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