Name any two organisms which respire only anaerobically throughout their lives.

Explanation

To answer the question "Name any two organisms which respire only anaerobically throughout their lives," we can follow these steps:

### Step-by-Step Solution:

1. **Understand Anaerobic Respiration**:
- Anaerobic respiration is a type of respiration that occurs in the absence of oxygen. Organisms that rely solely on this process are known as anaerobic organisms.

2. **Identify Types of Anaerobic Organisms**:
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