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18 January, 09:36

What is an unifying characteristic of all crustaceans?

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  1. 18 January, 10:39
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    A hard exoskeleton made of calcium - no internal skeleton. The head has two compound eyes, two pairs of antennae, and three pairs of mouthparts. A pair of green glands excrete wastes near the base of antennae. The abdominal segments have swimmerets (swimming legs)
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