5. Distinguish between the followings
(a) Prostomium and peristomium
(b) Septal nephridium and pharyngeal nephridiu
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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 |
Septal nephridium |
Pharyngeal nephridium |
They are present on both sides of | They are present as three paired |
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