Evolution

123456789101112
Across
  1. 4. The ability of an organism to survive and reproduce.
  2. 7. A trait that helps an organism survive and reproduce in its environment.
  3. 10. Differences in traits among individuals in a species.
  4. 11. Change in the characteristics of a species over time.
  5. 12. _____________ selection is the selection that favors the average phenotype and removes extreme phenotypes.
Down
  1. 1. _____________ selection is the selection that favors one extreme phenotype.
  2. 2. _____________ selection is the selection that favors both extreme phenotypes and selects against the average phenotype.
  3. 3. The formation of a new species.
  4. 5. A random change in DNA.
  5. 6. The process in which organisms with favorable traits survive and reproduce more.
  6. 8. An earlier organism from which other organisms evolved.
  7. 9. A characteristic of an organism.