BIOLOGY CROSSWORD

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Across
  1. 2. What type of population growth rate increases with an increase in population size?
  2. 3. Circadian rhythms are controlled by what tiny structures?
  3. 5. What forms a layer in the Earth's atmosphere protecting the Earth from UV radiation?
  4. 7. What aspect of a species’ niche is determined by abiotic factors?
  5. 10. Seasonal movement of populations annually?
  6. 11. What is an example of behaviour that occurs yearly?
  7. 12. Diversity of species in an ecosystem?
  8. 14. What type of resource is soil?
  9. 15. What organisms have adapted to living in the intertidal zone?
  10. 20. Name an example of adaptation against predation through natural selection?
  11. 22. What type of area slows down runoffs and prevents erosion?
  12. 23. How did behaviours controlled by genes evolve?
  13. 24. Innate behaviour is instinct when exposed to what?
  14. 25. Cooperation is found in what type of animals?
  15. 26. How many temperature zones exist?
  16. 27. Coevolution occurs due to which symbiotic relationship?
  17. 30. Ethologists study animal behaviour in what environment?
  18. 32. What behaviour is shown during aggression due to competition?
  19. 35. What region of the water in the photic zone is the neritic zone located?
  20. 38. What includes biotic and abiotic factors?
  21. 39. What type of natural selection helps an organism’s close relatives survive for the next generation?
Down
  1. 1. What is a natural feature of the Earth’s atmosphere?
  2. 4. Pioneer species perform which type of succession?
  3. 6. What are fossil fuels an example of?
  4. 8. What invention led to a decline in population growth in humans?
  5. 9. Differences amongst populations in a species?
  6. 13. Name of chemical communication?
  7. 16. Type of learning based on experience and reasoning?
  8. 17. The name of the population change that occurred in Europe and North America?
  9. 18. How should renewable resources be used?
  10. 19. Type of behaviour passed down and not taught?
  11. 21. How is population density represented?
  12. 28. What are predation species also known as?
  13. 29. What does the human introduction of exotic animals affect?
  14. 31. An important factor in population growth represented by a population pyramid is?
  15. 33. What type of competition leads to specialisation?
  16. 34. Why does character displacement occur?
  17. 36. What plays an important role in maintaining the Earth’s freshwater supply?
  18. 37. How often are the atmospheric conditions that refer to weather described?
  19. 38. Diversity provides humans with what benefits?