Plant and animal responses

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Across
  1. 3. stimulus. Controlled by auxin causing cell elongation.
  2. 4. Can be intraspecific or interspecific. Both parties lose out somewhat.
  3. 6. A rhythm with a period of approximately 29.5 days.
  4. 8. A feeding relationship where both species benefit
  5. 9. A means of orientation during migration –eg star patterns, using the sun as a compass, visual cues/landmarks, smell, major wind currents, major water currents.
  6. 11. A feature which enables an organism to have some increased likelihood of reproductive success.
  7. 12. once the night length is longer than a critical period.
  8. 13. A ranked order according to dominance with each member (except the alpha) being submissive to others.
  9. 14. The process by which the biological clock is kept in check with the environment, clock is entrained by a zeitgeber.
  10. 16. The repeated mass movement of a group resulting in greater reproductive success.Usually a return trip.
  11. 17. A response by an animal to a change in intensity of a diffuse (non-directional)environmental stimulus.
  12. 19. The ability of an animal to find its way
  13. 20. Rhythm Externally controlled (by environmental cues).
  14. 23. A reversible plant movement response to a non-directional environmental stimuli.Controlled by water movement.
  15. 24. A photoreceptor pigment involved in flowering-exists in two forms phytochrome red (P r ) and phytochrome far red (P fr ). P fr is the biologically active form.
  16. 25. A biological response to a change in the
  17. 27. Includes predation, parasitism and herbivory
  18. 28. A plant which will only be induced to flower once the night length is shorter than a critical period.
Down
  1. 1. The area which an animal marks and defends and which contains all the resources it needs to safely raise offspring.
  2. 2. This resets a biological clock and keeps the activity entrained to the changes in the environment.
  3. 4. A rhythm with a period of approximately 12.5 hours.
  4. 5. over unfamiliar territory.
  5. 7. A response by an animal to a directional environmental stimulus. Must state whether it is positive or negative.
  6. 10. of light and dark in a 24 hour
  7. 13. The area in which an animal will roam (not marked or defended).
  8. 15. An internal timing mechanism (controlled by genes).
  9. 18. A plant which will only be induced to
  10. 21. A rhythm with a period of approximately 24 hours.
  11. 22. A plant growth response to a directional
  12. 26. Rhythm Internally controlled (by genes).