| A | B |
|---|
| organ | a structure in the body that is composed of different kinds of tissue |
| adaptation | a characteristic that helps an organism survive in its environment or reproduce |
| herbivore | an animal that eats only plants |
| carnivore | an animal that eats only other animals |
| predator | a carnivore that hunts and kills other animals for food and has adaptations that help it capture the animals it preys upon |
| prey | an animal that a predator feeds upon |
| omnivore | an animal that eats both plants and animals |
| invertebrate | an animal that does not have a backbone |
| vertebrate | an animal with a backbone |
| bilateral symmetry | line symmetry; the quality of being divisible into two halves that are mirror images |
| radial symmetry | the quality of having many lines of symmetry that all pass through a central point |
| larva | the immature form of an animal that looks very different from the adult |
| cnidarian | animals whose stinging cells are used to capture their prey and defend themselves, and who take their food into a hollow central cavity |
| polyp | the cnidarian body plan characterized by a vaselike shape and which is usually adapted for life attached to an underwater surface |
| medusa | the cnidarian body plan characterized by a bowl shape and which is adapted for a free-swimming life |
| regeneration | the ability of an organism to regrow body parts |
| anus | The opening at the end of an organism's digestive system through which wastes exit |
