Language crossword

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Across
  1. 4. coldest biome,with no vegetation
  2. 6. synonim for ice age
  3. 9. mix of genes
  4. 10. permanent ice
Down
  1. 1. someone who conducts reindeerherders
  2. 2. make someone think what happen next
  3. 3. animal that lived 40.000 years ago
  4. 5. tone mood of a situation
  5. 7. maintain in its original state
  6. 8. genetic information