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| Possessing both male and female parts. |
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| Rasping tongue found in most mollusks |
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| Nacre; An organic-inorganic composite material produced by some mollusks |
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| A specialized type of free-living larva found in lophotrochozoans |
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| The soft, outermost layer of the body wall in mollusks; the mantle secretes the shell. |
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| In an annelid, bristles of chitin that help anchor the worm during locomotion, or when it is in its burrow. |
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| The reproductive part of a worm that produces cocoons. |
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| An internal skeleton, as in arthropods. |
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| Shedding of outer, cuticular layer; molting, as in insects or crustaceans |
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Definition
| A tube for breathing; in insects and some other terrestrial arthropods, a system of chitin-lined air ducts |
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| Blind tubules opening in to the hindgut of terrestrial arthropods; funcion as excretory organs |
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Definition
| A larval form characteristic of crustaceans |
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Definition
| A biological process by which an animal physically develops after birth or hatching, involving a conspicuous and relatively abrupt change |
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