Natural Selection Crossword

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Across
  1. 1. Remnants of the past, preserved in rock.
  2. 5. the combination of all the genes (including alleles) present in a reproducing population or species.
  3. 6. when certain heritable traits become more common in a population due to their advantage in survival and reproduction.
  4. 8. within a population traits of individuals differ from each other
  5. 9. when some individuals in a population have a trait that makes them better able to survive. these traits are passed on to the next generation.
  6. 11. A british nationalist who proposed the theory of evolution by natural selection
  7. 13. _________ structures have no apparent function and appear to be residual parts from a past ancestor
  8. 14. the degree to which an organism is suited for survival
  9. 15. the change in the heritable characteristics of biological populations over successive generations.
Down
  1. 2. ________ speciation does not involve geographical isolation
  2. 3. ________ speciation involves geographic isolation.
  3. 4. _________ structures are inherited from a common ancestor and have different functions
  4. 7. _________ structures are not inherited from a common ancestor and have similar functions
  5. 10. the set of observable characteristics or traits of an organism
  6. 12. variations of genes, leading to diverse traits such as eye color.