Three Representative Organisms

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Three representative organisms: Arthropods Coleoptera (beetle) The Coleoptera (beetle) is characterized by "hardened front wings (elytra)" that "meet in a straight line down the center of the back" ("Coleoptera," General Entomology, 2012). The complete development cycle of beetles consists of the conventional egg, larva, pupa, and adult progression. The class is "divided into four suborders. The most common are Aedephaga and Polyphaga. In the case of Aedephaga, "the first abdominal sternum is divided by the hind coxae" and in the case of Polyphaga "the first abdominal sternum is undivided" ("Coleoptera," General Entomology, 2012). Beetles come in a wide variety of types. "Coleoptera is the largest order in the animal kingdom. It includes 40% of all insects and nearly 30% of all animal species" ("Bug Bytes," General Entomology, 2012). Beetles can exist as "predators, parasites or commensals" in terms of the way in which they survive and sustain themselves ("Bug Bytes," General Entomology, 2012). Lepidoptera (Arctiidae) The class of Lepidoptera (moths and butterflies) is the second largest order in the insect world. Nearly all organisms begin the form of larvae called caterpillars (Meyer 2009). After undergoing a pupae stage, the adults emerge with "distinctive...large wings (relative to body size) which are covered with minute overlapping scales" (Meyer 2009). The front wings are large and triangular-shaped while the hind wings are smaller and fan-shaped (Meyer
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