Spot the one that does not fit

Exercise and reference answers

Questions

1. Items

   1. Penicillin
   2. Curd
   3. Idli dough
   4. Swiss cheese

   Odd item

   Penicillin

2. Items

   1. Fleming
   2. Chain
   3. Florey
   4. Methanobacterium

   Odd item

   Methanobacterium

3. Items

   1. Filtering debris
   2. Settling grit
   3. Aeration tank
   4. Primary sludge

   Odd item

   Aeration tank

4. Items

   1. Gobar gas
   2. Methanogens
   3. Dung
   4. Baker's yeast

   Odd item

   Baker's yeast

Instructions

Tap the item that does not belong with the rest.

Explanation