Plant and animal responses

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