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प्रश्न
Distinguish between the following - Prostomium and peristomium
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उत्तर
| Prostomium | Peristomium | |
| Prostomium is a small fleshy lobe, which overhangs the mouth of an earthworm. It helps the organism push into the soil and is sensory in function. | The first body segment in the earthworm is called the peristomium. It surrounds the mouth opening | |
| Ii does not contain mouth | it contain mouth | |
| It serves as wedge to force open cracks in the soil in which the earthworm lives | It does not happen in peistomium | |
| It is sensory in function | it is not sensory |
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