Answer:
Each subunit surrounds a central heme group that contains iron and binds one oxygen molecule, allowing each haemoglobin molecule to bind four oxygen molecules. Molecules with more oxygen bound to the heme groups are brighter red.
I hope I answer your question
thanks!
The cell wall is the outside layer of the cell whereas the cell membrane is surrounds the cytoplasm of the cell.
C. Medusa. Everything else on the list is a part of another creature, medusa is the only cnidarian here!
