Across
- 2. A state of inactivity during winter when an animal's biological processes slow down.
- 5. An interaction between living things in which each living thing tries to get a limited resource, such as food, mates, or shelter.
- 8. An animal whose body produces most of the heat it needs; a warm-blooded animal.
- 9. Movement from one location to another, especially when it occurs according to the season of the year.
- 11. Something that directly causes a living thing to act in a certain way. The plural of stimulus is stimuli.
- 16. An interaction in which animals work together for a common benefit.
- 19. An animal whose main source of body heat comes from the environment; a cold-blooded animal.
- 21. A physical ability by which an animal observes stimuli in its environment.
- 22. A coloring or other physical feature of an animal that helps it blend into its surroundings.
Down
- 1. An action of an animal in response to a stimulus.
- 3. To imitate closely in some way.
- 4. A behavior that is inherited rather than learned.
- 5. A behavior used to select and attract a mate for reproduction.
- 6. An organ used to sense the external environment. Eyes and ears are examples of sense organs.
- 7. A temporary state of inactivity that can be broken when conditions are favorable for growth.
- 10. A system in which animals belonging to a group are ranked in terms of status.
- 12. Gained through experience.
- 13. A part of an organism's body that detects stimuli. Many different body parts can be receptors, including cells, hairs, and organs.
- 14. A sound or series of sounds made by the respiratory system for the purpose of communicating.
- 15. A group of individuals of the same species living together in the same area at the same time.
- 17. Reactions to a stimulus.
- 18. An area of land defended by an individual or group in order to control the resources in that area.
- 20. A state of stability or equilibrium that is maintained by constantly making adjustments in a changing environment.
