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प्रश्न
Differentiate between peristomium and prostomium in earthworm.
उत्तर
1. Peristomium:
The first segment of the body of earthworms is called peristomium.
2. Prostomium:
A small flap overhanging the mouth is called prostomium or upper lip.
संबंधित प्रश्न
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