Crossword puzzle on Role of Microorganism

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Across
  1. 2. process in which fungi like yeast, reproduce quickly and produces carbon dioxide. Carbon dioxide mixes with the dough or batter and increases its volume and makes it fluffy and soft.
  2. 4. process used for wastewater treatment.
  3. 5. used as fuel for production of energy.
  4. 6. chemicals produced by microorganisms,that kill or inhibit the growth of other harmful microorganisms.
Down
  1. 1. convert the dead remains of plants and animals to humus.
  2. 3. ability of an organism to resist an infection.