Chapter 15

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Across
  1. 1. predicted human population will grow faster then supplies needed
  2. 3. one of the first to propose a mechanism of change over time in organisms
  3. 4. the ability of an individual to survive
  4. 5. what did Darwin refer to “survival of the fittest” as
  5. 8. in ______, nature provided the variation
  6. 9. walking leaf insect in picture is an example of
Down
  1. 2. any inherited characteristic
  2. 6. well supported hypothesis, but not proven
  3. 7. change over time