<span>Because the bases can be arranged in many different combinations</span>
Answer:
CO2 and H2O is correct and now I just have to fill space sooooo
Blood
Blood is the transport fluid circulating in the body and is responsible for the transport of substances from one point to another. Blood is composed of red blood cells, white blood cells, platelets and plasma. All of these components work together and transport substances such as oxygen, glucose and amino acids to the cells and remove waste substances such as carbon dioxide and urea away from the cells.
I'm pretty sure the answer is: B. Sickle-cell disease
