Plant and Animal Behaviour & Responses

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Across
  1. 4. Plants that have seeds that will only germinate when an inhibitor is washed out of the seed, then run their life cycle very rapidly. They are often found in deserts
  2. 8. The environmental agent that resets the biological clock. E.g. a change in temperature
  3. 9. Chemicals that produced colour in plants
  4. 10. of the rhythm The time it takes to complete one cycle of the activity (from onset to onset)
  5. 11. The falling of leaves, fruits and flowers
  6. 13. A yearly activity period
  7. 16. rhythm Cyclic environmental changes caused by Earth’s rhythm
  8. 17. Active mostly during the day
  9. 19. Plants that grow, store food in the first year, then go through a period of chilling and flower the next year
  10. 20. Active at dawn and dusk
  11. 21. The regulation of activity by daylength
  12. 26. A monthly activity period
  13. 27. A state of temporarily reduced metabolism
  14. 31. No regular pattern in a daily cycle
  15. 33. A daily activity period
  16. 34. A state of inactivity or dormancy in animals during seasonal hot or day conditions
  17. 35. day length (CDL) The photoperiod above which long-day plants flower and below which short-day plants flower
  18. 37. A green pigment found in the chloroplasts – it absorbs light for photosynthesis
  19. 38. Rhythm A periodic change in behaviour or physiology that are generated and maintained by a biological clock
  20. 39. The resetting of the biological clock on a regular basis
  21. 40. A biological rhythm driven by external stimuli
Down
  1. 1. A blue-green protein found in most plants, which plays an essential part in a number of plant processes such as the measurement of the photoperiod
  2. 2. A period of dormancy of animals during seasonal cold conditions
  3. 3. When a seed grows it first root (radicle) and shoot (plumule)
  4. 5. running When the biological clock is running without any clues from the environment
  5. 6. cues Factors in the environment, used by organisms to establish and maintain a pattern of activity e.g. temperature
  6. 7. A tidal activity period
  7. 12. A hypothetical plant hormones, inferred to be induced in leaves and to travel to a shoot apex to cause flowering
  8. 14. day plants A plant that flowers when day length exceeds a certain minimum value
  9. 15. The induction of flowering by a period of chilling
  10. 18. A recording of an animals activity
  11. 22. neutral plants A plant that flowers independently of day length
  12. 23. Active mostly during the night
  13. 24. Pinks, reds through to purple pigments
  14. 25. Clock An internal timing system that continues without external cues
  15. 28. shift When the onset of the period of the rhythm is changed
  16. 29. A lunar (moon) activity period
  17. 30. A mass movement of members of a species, usually at regular intervals over large distances
  18. 32. A biological rhythm driven by internal stimuli
  19. 36. day plants A plant that flowers when day length is less than a certain minimum value