Hemoglobin is contained in red blood cells,which efficiently carries oxygen from the lungs to the tissues of the body. It also helps in the transportation of carbon dioxide and hydrogen ions back to the lungs.
I would say the first one a comet. :)
Answer:
your answer is D) A section of DNA that codes for a specific trait
Explanation:
Atomic mass is determined by the number of protons plus the number of neutrons
