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on 05-Jun-2017 (Mon)

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Insects are the only invertebrates to have developed active flight capability
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Insect - Wikipedia, the free encyclopedia
ns, criss-crossing each other in a sandwich pattern, while the exocuticle is rigid and hardened . [ 22 ] :22–24 The exocuticle is greatly reduced in many soft-bodied insects (e.g., caterpillars ), especially during their larval stages. <span>Insects are the only invertebrates to have developed active flight capability, and this has played an important role in their success. [ 22 ] :186 Their muscles are able to contract multiple times for each single nerve impulse, allowing the wings to beat faster