natural selection quiz

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Across
  1. 3. changes to short sections of DNA known as genes
  2. 5. is the study of parents passing traits to offspring
  3. 8. study of heredity
  4. 11. A difference between a species
Down
  1. 1. the process by which individuals who are the best suited to survive their environment, reproduce and pass on their traits to the next generation
  2. 2. a naturalist
  3. 4. has a positive effect on the organisms survival
  4. 6. traits that help a species survive in their environment
  5. 7. a species physical change
  6. 9. evolve or change over time
  7. 10. a species surviving in its environment