Ideas from Nature

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Across
  1. 2. look closely at something
  2. 3. things are alike but not exactly the same
  3. 5. thing to show what other similar things are like
  4. 6. try to be like; copy
  5. 8. the stuff something is made of
Down
  1. 1. works well
  2. 4. exactly the same
  3. 7. small copy of something else