sci

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Across
  1. 2. (The process that produces glucose and oxygen from sunlight)
  2. 3. (The process of breaking down glucose without oxygen)
  3. 5. (The four letters that represent nitrogenous bases in DNA)
  4. 7. (A sticky substance in cigarettes that stains teeth and causes cancer)
  5. 11. (A cell organelle responsible for energy production during cellular respiration)
  6. 12. (Disease caused by fatty deposits in the arteries)
Down
  1. 1. (Genetic trait where neither allele is dominant, and both are expressed equally)
  2. 4. (A gas exhaled by organisms after respiration)
  3. 6. (The cycle where carbon dioxide is fixed during photosynthesis)
  4. 8. (The organ system affected by smoking and secondhand smoke)
  5. 9. (Pigment that absorbs sunlight for photosynthesis)
  6. 10. (Term for species no longer in existence)
  7. 13. (A chemical element necessary for aerobic respiration)