I am a population.
-Hope I helped.
#11 is Binary Fission
#12 is Tissue or Tissues
#15 is Eukaryotic
Hemoglobin has tetrahedral structure containing four heme groups that surround a globin group.
Heme is ringlike organic compound also known as a porphyrin to which an iron atom is attached. There are four iron atoms that bind four oxygen atoms and transport them to tissues.
