Name one non-symbiotic nitrogen fixing prokaryote .

Explanation

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a non-symbiotic nitrogen-fixing prokaryote. This means we need to identify a prokaryotic organism that can fix nitrogen from the atmosphere without forming a symbiotic relationship with another organism.

2. **Defining Non-Symbiotic Nitrogen Fixation**: Non-symbiotic nitrogen fixation refers to the process where certain prokaryotes can convert atmospheric nitrogen (N₂) into ammonia (NH₃) independently, without partnering with plants or other organisms.

3. **Identifying Prokaryotes**: Prokaryotes are single-celled organisms that lack a nucleus. Examples include bacteria and archaea. We need to focus on those that are known for their ability to fix nitrogen.

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