cells

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Across
  1. 4. A structure having an uneven distribution of electron density
  2. 6. an article or substance that is manufactured or refined for sale.
  3. 7. a compound consisting of a nucleoside linked to a phosphate group
  4. 8. a substance that increases the rate of a chemical reaction
  5. 12. the diffusion of water
  6. 14. a substance produced by a living organism
  7. 16. any of a large group of organic compounds that includes sugars, starch, and cellulose,
  8. 17. facts and statistics collected together for reference or analysis.
  9. 18. a molecule containing a very large number of atoms
Down
  1. 1. a molecule that can be bonded to other identical molecules to form a polymer.
  2. 2. a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding
  3. 3. that contain equal numbers of protons but different numbers of neutrons in their nuclei
  4. 5. a substance that takes part in and undergoes change during a reaction.
  5. 6. any of a class of nitrogenous organic compounds
  6. 9. any of a class of organic compounds that are fatty acids
  7. 10. having assets in excess of liabilities; able to pay one's debts.
  8. 11. a substance that has a molecular structure consisting chiefly
  9. 13. an underlying substance or layer.
  10. 15. a means of solving a problem or dealing with a difficult situation.