Evolution and Natural Selection

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Across
  1. 2. When only one organisms is needed to reproduce
  2. 6. Change of a species over long periods of time
  3. 9. A cell with a nucleus
  4. 10. A change in a species of organisms that help them survive better
  5. 11. Event that takes out thins unfavorable traits from a population
  6. 12. The study of embryos and how they change over time
  7. 15. The addition or removal of genes in as population
  8. 16. Those with the best traits have a higher chance of survival
  9. 17. A change in behavior a species inherit throughout time that help it in an environment
  10. 18. Small single cell organisms that are the most abundant on earth
  11. 19. The variation of genes
  12. 20. A type of bacterial reproduction
Down
  1. 1. A change that influence the physical structure of an a species for the better
  2. 3. When two organisms are needed to reproduce
  3. 4. When an species of organisms cease to exist
  4. 5. Genes inherited from parents
  5. 7. Formation of new species through evolution
  6. 8. An event that directly limits the population
  7. 13. A cell that lacks a nucleus
  8. 14. The when other species affect the evolution other species