EVOLUTION

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Across
  1. 2. suitable for a new use or purpose; modify.
  2. 4. structure or internal workings.
  3. 8. the branch of science concerned with fossil animal and plants.
  4. 10. the end of a species.
Down
  1. 1. a form "super continent" on the earth.
  2. 3. the amount or count in a certain areal of a species.
  3. 5. diversified from earlier form during the history of the earth.
  4. 6. a group of a type of organisms or animals.
  5. 7. an antiquated or stubbornly unchanging person or thing.
  6. 9. physical structure and substance.