Isopods have 14 legs that all function the same. Segmented overlapping shell (seven overlapping plates). Like most insects it has three parts: head, thorax, and abdomen. It also has three pairs of legs. They go through complete metamorphsis like butterflies and moths. Egg Larvae (mealworms) Pupa Adult Beetle Life Cycle Environemental Preference refers to the mix of environmental factors that you choose to have around you. Name some of your prefered environments. Isopods and darkling beetles have different prefered environment. Both Isopods and Darkling Beetles prefer dark environments. Isopods are related to crayfish and crabs, like these aquatic organisms isopods breathe through gill-like organs instead of lungs. Isopods prefer moist environments where they feed off decaying plants material. Often found in leaf litter and rotting wood. They have no need for moisture in tehir environment . They get all the water they need through the grains they eat. Darkling beetles prefer a warm dry envrionment. Beetle: A type of insect with special forewings, which form hardened wing covers that cover a second pair of wings. Isopod: A small crustacean with 14 legs that all function the same. Preferred environment: The set of environmental conditions that an organism appears to choose over other conditions. Variable: Something that can be changed.