Adaptive features and populations

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Across
  1. 3. the chance of remaining alive
  2. 4. a defended area with defined boundary
  3. 7. how much organisms an environment can support
  4. 8. the study of organisms, their surroundings and their relationships
  5. 9. another word for surroundings
  6. 12. a group of organism belonging to one species at a particular area at one time
  7. 14. nonliving
  8. 17. the sector of the population that is reproducing
  9. 19. the role of an organism
  10. 22. inherited characteristics which enable organisms to survive
Down
  1. 1. the rate of growth where the number increase rapidly and douling time gets shorter and shorter
  2. 2. the movement of organisms
  3. 5. the act of adjusting tolerance limits
  4. 6. the Russian scientist who states that two species with similar niche will compete
  5. 10. ability of any organism to withstand variation in their environment
  6. 11. the best or most suitable conditions
  7. 13. birth rate
  8. 15. any living thing
  9. 16. adaptations that ensure that organisms act in a certain way to survive
  10. 18. a state where an organism’s body experiences physical, automatic response to internal or external threats that disrupt homeostasis
  11. 20. where an organism usually lives
  12. 21. the measure of how many organisms are there in an area