Evolution

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Across
  1. 3. ancestral organisms shared by at least two or more descendant lineages.
  2. 4. to remain alive.
  3. 7. he proposed a theory of evolution based on the principle that things change during ones lifetime.
  4. 10. the difference in DNA sequence across a species.
  5. 11. any change in the characteristics of organisms.
  6. 12. A variety of life.
Down
  1. 1. production of offspring.
  2. 2. organisms best adapted to the environment best suited to surviving reproduce.
  3. 5. A british naturalist who proposed a theory of biological evolution by natural selection.
  4. 6. The best adapted in the environment survive and are able to reproduce to pass on their genes.
  5. 8. a group of organisms able to reproduce with each other.
  6. 9. when organisms adjust to their environment.