Evolution

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Across
  1. 5. The more ___ within a population, the more likely the population will survive changing environments.
  2. 6. a change in gene frequency within a population
  3. 7. 3.5 billion years old
  4. 10. changes in an organism that allow it to tolerate its environments but are not passed on to offspring
  5. 11. Natural selection acts on ___.
  6. 13. devised the Theory of Acquired Characteristics
  7. 14. large-scale history of life
Down
  1. 1. two parents -> one offspring
  2. 2. changes over time give rise to new species
  3. 3. wrote On the Origin of Species
  4. 4. variations lead to ____
  5. 8. diagram of evolutionary relationships
  6. 9. 4.5 billion years old
  7. 10. one parent -> two offspring
  8. 12. Darwin's Theory of Evolution is descent with ____.