B4

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Across
  1. 5. the largest population an environment can support
  2. 7. the growth of cities that changes natural habitats and ecosystems
  3. 10. the process where organisms with helpful traits survive and reproduce more
  4. 12. the process of species changing over time
  5. 13. organisms that eat other organisms
  6. 14. a random change in DNA that can create new traits
  7. 15. nonliving parts of an environment like water or temperature
  8. 17. organisms that break down dead matter and recycle nutrients
  9. 18. an organism’s ability to survive and reproduce
  10. 20. a network of interconnected food chains
Down
  1. 1. organisms that make their own food (like plants)
  2. 2. a group of the same species living in one area
  3. 3. a sequence showing how energy moves through organisms
  4. 4. the breaking of habitats into smaller isolated pieces
  5. 6. the variety of life in an ecosystem
  6. 8. reproduction between closely related individuals
  7. 9. living parts of an ecosystem
  8. 11. traits that help organisms survive in their environment
  9. 16. the movement of genes between populations
  10. 19. different forms of the same gene