Variation..On a Variation

123456789101112131415161718
Across
  1. 4. When a species completely dies out (10)
  2. 8. The process where certain traits increase survival chances (9)
  3. 12. When organisms fight for limited resources (11)
  4. 13. The process by which better adapted individuals survive and reproduce (16)
  5. 15. Living factors within an ecosystem (6)
  6. 16. A community of organisms interacting with their environment (9)
  7. 17. All the individuals of one species in an area (10)
  8. 18. Characteristics passed from parents to offspring through genes (9)
Down
  1. 1. Differences between individuals of the same species (9)
  2. 2. Non-living physical factors in an ecosystem (7)
  3. 3. An set of organism that definitely did not pass on its genes (8)
  4. 4. Gradual change in a species over many generations (9)
  5. 5. The surrounding conditions in which organisms live (11)
  6. 6. A feature that improves survival in a particular environment (10)
  7. 7. Units of DNA that determine inherited characteristics (5)
  8. 8. A group of organisms that can reproduce and produce fertile offspring (7)
  9. 9. Long-term patterns of weather in a region (7)
  10. 10. The ability to survive and reproduce successfully (7)
  11. 11. The natural place where an organism lives (7)
  12. 14. Variation caused by surroundings rather than genes (13)