Across
- 4. orientation resulting from change in the rate of activity
- 6. recording showing how level of animal activity changes over time
- 7. having an external origin
- 9. active at night
- 10. period of greatly reduced activity in anticipation of winter
- 11. having an internal origin
- 13. physical or non-living environmental factor
- 14. a movement towards ot away from a stimulus
Down
- 1. the sum total of an organism's requirements.Its way of life
- 2. duration of one complete cycle of a rhythm
- 3. rhythm which under constant environmental condition has a period of about a day
- 5. a rhythmic environmental cue that resets an internal clock
- 8. resetting an internal clock by a rhythmic environmental cue
- 10. the place where an organism lives
- 12. a change in an organism's environment to which it can respond