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In earthworm, the humic acid present in humus part of soil is neutralized in stomach by secretion of
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Important Questions on Structural Organisation in Animals (Animal Morphology)
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The surface area of intestine in earthworm is greatly increased by the presence of
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In earthworm, stomach are present in the
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In earthworm, and segments bear loop-like broad vessels without valves, such vessels are known as
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In earthworm, diffuses out to surrounding atmosphere through
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In earthworm, nerve ring lies in
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In earthworm, nerve cord runs posteriorly in
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Earthworms can feel the ground by presence of
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Periplaneta americana and Blatta orientalis differ mainly from each other in
