Earthworm is hermaphroditic animal but always cross fertilization. Why ?

Explanation

### Step-by-Step Solution:

1. **Understanding Hermaphroditism**:
- Earthworms possess both male and female reproductive organs, which classifies them as hermaphroditic animals. This means they have the capability to produce both sperm and eggs.

2. **Definition of Protandrous**:
- Earthworms are described as protandrous, meaning that their male reproductive organs mature before their female reproductive organs.

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