Biology Crossword Puzzle

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Across
  1. 2. what are the tails of lipids called
  2. 6. a lipid who's head is polar
  3. 7. monomer of carbs
Down
  1. 1. Another carb that can store energy
  2. 3. first step of the scientific method
  3. 4. A carb that can store energy
  4. 5. polymers of nucleic acid