Spot the odd one out

Exercise and reference answers

Questions

1. Items

   1. Sewage
   2. Curd
   3. Dough
   4. Cheese

   Odd item

   Sewage

2. Items

   1. Biogas
   2. Penicillin
   3. Methanogen
   4. Gobar gas

   Odd item

   Penicillin

3. Items

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

   Odd item

   Rhizobium

4. Items

   1. Rhizobium
   2. Glomus
   3. Anabaena
   4. Baculovirus

   Odd item

   Baculovirus

Instructions

Tap the item that does not belong with the others.

Explanation