| A | B |
|---|
| tentacle | a ropelike part that surrounds the mouth of a stinging-celled animal |
| invertebrate | an animal without a backbone |
| insects | largest group of arthropods |
| vertebrate | an animal with a backbone |
| classification | grouping organisms by similar characteristics |
| arthropod | the largest animal group |
| mollusks | the second largest animal group |
| starfish | a spiny-bodied animal |
| sponge | simplest kind of animal |
| parasite | an organism that feeds on and causes harm to another |
| scavenger | an animal that eats dead animals |
| regeneration | the ability to regrow damaged cells or body parts |
| cells | what every living organism is composed of |
| exoskeleton | outer bodies of arthropods |
| earthworms | segmented worms |
| tapeworms | flatworms |
| flatworms | tapeworms |
| centipedes | hide under logs or rocks during the day and feed at night |
| jellyfish | a stinging-celled animal |
| octopus | a mollusk without a shell |
| arthropods | largest group of animals |
| squid | has shell inside body |
| the classification of everything | living or nonliving |
| millipedes | two pairs of legs per body segment |
| lubber grasshopper | found in SW United States |
| mollusks | second largest group of animals |
| vertebrate | has a backbone |
