Year 9 Biology

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Across
  1. 4. a non-living factor of the environment
  2. 6. species not native to Australia
  3. 9. an introduced species of animal that has become established in the wild
  4. 12. quick automatic actions that protect the body from danger
  5. 15. the study of how organisms interact with each other and with their non-living environment
  6. 16. the brain and spinal cord
  7. 18. animals that generate body heat internally
  8. 20. organisms that break down the bodies of dead organisms and animal wastes
  9. 21. a nerve fibre that sends nerve impulses away from the cell body
  10. 22. animals that obtain their body heat from outside their body
  11. 23. the range of different species in a community
  12. 24. the space between two neurons
  13. 25. a living factor of the environment
Down
  1. 1. a sequence of organisms feeding on each other
  2. 2. connected food chains showing who eats whom in a community
  3. 3. relationship where one organism kills and eats another organism
  4. 5. a nerve cell
  5. 7. branches from the cell body that receive messages from other neurons
  6. 8. organelles where respiration occurs
  7. 10. muscles or glands that put the messages into effect
  8. 11. the nerve pathway operating in a reflect action
  9. 13. organims that make food for the community
  10. 14. a chemical message released at the end of an axon to be received by the next neuron's dendrites
  11. 17. chemical substances that act as messengers in the body
  12. 19. a specialised cell that detects stimuli