Which one does not belong?

Exercise and reference answers

Questions

1. Items

   1. Photosystem
   2. Adaptation
   3. Selection
   4. Fitness

   Odd item

   Photosystem

2. Items

   1. Bat wing
   2. Fish gill
   3. Insect wing
   4. Bird wing

   Odd item

   Fish gill

3. Items

   1. Inherited
   2. Varying
   3. Immortal
   4. Overproduced

   Odd item

   Immortal

Instructions

Tap the item that does not fit with the other three.

Explanation