uni- and bi-

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Across
  1. 1. a horse-like fabled animal that has one horn growing out of the middle of its forehead
  2. 3. eyeglasses with lenses that have two different sections for seeing close up and far away
  3. 5. having only one cell
  4. 6. happening every two years
  5. 7. a two-pointed tooth located in the side of the jaw
  6. 8. a vehicle with only two wheels
Down
  1. 1. a one-wheeled vehicle on which the rider sits and pedals
  2. 2. having two different colors
  3. 4. to join together into one group
  4. 5. moving in only one direction