Evolution by natrual selection

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Across
  1. 3. your ..... parents
  2. 5. an ape that we evolved from
  3. 6. biological predecessor
  4. 7. the whole number of animals in a species
Down
  1. 1. the process of changing over a long period of time
  2. 2. when something goes wrong
  3. 3. an instrument used for eating by birds
  4. 4. contains DNA