| A | B |
|---|
| Homoptera | an order of insects having piercing-sucking mouthparts and wings that form the shape of a tent when at rest |
| host | any plant or animal on or in which a parasite lives |
| hydra | a tiny, feshwater invertebrate with tentacles at its mouth and base |
| Hymenoptera | an order of insects usually having two pairs of filmy wings and chewing or chewing-lapping mouthparts |
| Hymenoptera | order of insects which includes ant, bee, and wasp |
| incomplete metamorphosis | a three-stage change in body form that insects such as crickets, dragonflies, grasshoppers, and mantises undergo |
| egg, nymph, adult | the three stages of incomplete metamorphosis |
| insect | a member of a large group of arthropods having three pairs of legs, three body parts as an adult, and usually two pairs of membranous wings |
| insecticide | a chemical used to kill insects |
| insectivorous | a word meaning "insect-eating" |
| invertebrate | a animal with no backbone |
| jellyfish | a bowl-shaped ocean invertebrate with long tentacles that shoot stinging poison into anything they touch |
| krill | a small, shrimplike crustacean that is food for large ocean animals |
| lac insect | a sucking insect of the order Homoptera that is found in southern Asia |
| lac insect | the female of this species secretes a substance used in making shellac |
| ladybird beetle | a beneficial insect of the order Coleoptera |
| ladybird beetle | another term for a ladybug |
| larva | a young stage, or early form, of an animal |
| larva | of insects undergoing complete metamorphosis, the stage between egg and pupa |
| Lepidoptera | an order of insects having sucking mouthparts, and thousands of microscopic scales on each wing |
| Lepidoptera | order of insects that includes the butterfly and moth |
| lobster | a crustacean having a tail, long antennae, eight legs, and two large pincers |
| locust | an insect of the order Orthoptera that often travels in great swarms causing extensive damage to crops |
| locust | another name for a grasshopper with short antennae |
| Lyme disease | a crippling disease that is spread by a tick |
| malaria | a tropical disease caused by a protozoan parasite and spread by mosquitoes |
| mange | a skin infection of mammals caused by mites |
| mantle | of mollusks, the organ that secretes the shell |
| medusa | the free-floating, umbrella-shaped stage of a jellyfish |
| millipede | a many-legged arthropod similar to the centipede but with a round rather than a flat body and having two pairs of legs per body segment |
| mite | a tiny arachnid |
| mollusk | any of a large phylum of softbodied animals without a backbone, often having an exoskeleton |
| molt | to shed and replace the exoskeleton, as does a grasshopper or a crab |
| mosquito | an insect of the order Diptera, having piercing-sucking mouthparts with a tubular structure extending from its head |
| mosquito | only the female of this species sucks blood |
| moth | a nocturnal insect of the order Lepidoptera that has a thick body and feathery antennae |
| mussel | a two-shelled (bivalve) mollusk found in both fresh and salt water |
| nautilus | an ocean mollusk (cephalopod) with numerous short tentacles and a many-chambered, spiral shell |
| nocturnal | term meaning "active at night" |
| nudibranch | a colorful gastropod having no shell |
| nudibranch | also known as a sea slug |
| nymph | a young insect of incomplete metamorphosis |
| nymph | in incomplete metamorphosis, the stage between egg and adult |
| octupus | a shy, ocean cephalopod with eight tentacles |
| Odonata | an order of insects having long, slender bodies, huge compound eyes, chewing mouthparts, and two pairs of equal-sized transparent wings |
| Odonata | order of insects that includes the damselfly and dragonfly |
| order | division of plants or animals larger than a family but smaller than a class |
| Orthoptera | an order of insects having chewing mouthparts and straight, papery wings that fold in a line along their bodies |
| Orthoptera | order of insects that includes cockroaches, crickets, grasshoppers, katydids, and mantises |
| Homoptera | order of insects that includes aphids, cicadas, and hoppers |
