You are presented with the question "Breathing is when a gill converts from oxygen in water into" and the following answer choices: 
- tiny polyps
 - Hemoglobin
 - salmon
 - motility
 - unidirectional
 - exoskeleton
 - heat energy
 - epidermal

Now knowing that breathing is when a gill converts from oxygen in water into oxygen in blood and hemoglobin transports oxygen in blood, choose the best answer.


 

  Hemoglobin       