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invertebrates that have an external skeleton, a segmented body, and jointed attachments called appendages


a waxy, waterproof outer shell or outer skeleton that protects the animal and helps prevent evaporation of water


the process of shedding an outgrown exoskeleton


an appendage attached to the head that contains sense organs


an arthropod that has two or three body sections, five or more pairs of legs, and two pairs of antennae


a process in which an animal's body undergoes dramatic changes in form during its life cycle


arthropods with two body sections, four pairs of legs, and no antennae


the hind section of an arthropod's body that contains its reproductive organs and part of its digestive tract


jointed attachments


in segments


parts that help move


arthropods with three body sections, six legs, one pair of antennae, and usually one or two pairs of wings


an insect's midsection, to which its wings and legs are attached


the third stage of complete metamorphosis, in which an insect changes from a larva to an adult

complete metamorphosis

a type of metamorphosis characterized by four dramatically different stages


a stage of gradual metamorphosis that usually resembles the adult insect

gradual metamorphosis

a type of metamorphosis in which an egg hatches into a nymph that resembles an adult, and which has no distinct larval stage

food chain

a series of events in which one organism eats another and obtains energy


the study of food chains and other ways that organism interacts with their environment


an animal that carries pollen among plants


a chemical that kills pests

biological control

a natural predator or disease released into an area to fight a harmful insect

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