Class IX

Too little carbon dioxide (CO2) in lungs leads to
  1. no breathing
  2. over breathing
  3. under breathing
  4. asthma
To form cheese, a mixture of bacteria and fungi act upon
  1. fermented milk sugar
  2. lactic acid
  3. fats
  4. all three
Primary factors controlling rate of photosynthesis are known as
  1. inhibiting factors
  2. limiting factors
  3. expediting factors
  4. supporting factors
Tissue cells like cartilage may not have a direct contact with+
  1. blood arteries
  2. blood veins
  3. tissue fluid
  4. blood capillaries
Yeasts are
  1. unicellular fungi
  2. multicellular fungi
  3. bicellular fungi
  4. tricellular fungi
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