Answer: Whisky and rum have higher alcohol content.
- A Wine and beer are not fermented at all
- B Whisky and rum have higher alcohol content
- C Whisky and rum use bacteria instead of yeast
- D Wine and beer are distilled twice
Correct answer: B. Whisky and rum have higher alcohol content
Explanation: Beverages like whisky, brandy and rum are produced by distillation of the fermented broth, giving them a higher alcohol percentage than undistilled wine and beer.
Sewage passes through physical removal (primary), then aerobic biological treatment where microbes form flocs that consume organic matter (secondary); the settled activated sludge is then digested anaerobically to produce biogas - a deliberate switch from aerobic to anaerobic conditions between stages.
Concept context
Microorganisms in food, medicine, sewage treatment, biocontrol, and biofertilizers