| A | B |
| arrows which indicate the energy flow | food web arrows |
| the special role each organism plays in its habitat | unique niche |
| a plant eater, a primary consumer | herbivore |
| a meat eater, a secondary consumer | carnivore |
| the process of making more organisms of the same kinds | reproduction |
| the stages in an organism's life from birth to death | life cycle |
| a change in the shape or characteristics of an animal's body as it grows | metamorphosis |
| a set of interchanging parts | system |
| characteristics that are passed from parent to offspring | inherited traits |
| a behavior an animal develops by observing other animals or by being taught | learned behavior |
| the power to affect the way an organism develops or behaves without using direct force | influence |
| the structure or behavior that helps an organism survive in its surroundings | adaptation |
| the state of continuing to live or exist | survival |
| all the living and nonliving things that interact with each other in an environment | ecosystem |
| a place in an ecosystem where a population lives | habitat |
| a group of animals or plants whose members are similar and can breed together | species |