Chapter 16/17-Molly Daugherty

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Across
  1. 2. dating method that used the decay of radioactive isotopes to measure the age of a rock
  2. 4. by natural selection-explained how life on Earth changed over many generations
  3. 5. structures that serve no function but were useful structures in earlier ancestors
  4. 7. one end of a bell-curve has higher fitness
  5. 8. bodily structures that are similar in function but not in structure
  6. 9. both ends of the curve have higher fitness
  7. 10. the number of times that the allele occurs in a gene pool compared with the number of times other alleles for the same gene occur
Down
  1. 1. bodily structures that are similar in structure, but different in function
  2. 3. middle of the curve has higher selection
  3. 6. a change following a dramatic reduction in the size of a population