Answer: RBC/ Erythrocytes/ Red blood cells
<u>Explanation</u>: The blood consists of the following components- white blood cells, red blood cells, platelets and plasma. Different components perform different functions.The part which carries the gases is the RBCs or erythrocytes. They carry oxygen as well as carbon dioxide. RBC’s contain a pigment- hemoglobin, which binds oxygen molecules and carries it to each and every cell of the body.
<span><span>b.
</span>Lipids</span>
<span><span>
c.
</span>proteins</span>
<span>
Macromolecules
are a set collection of polymers that composes most of the organic substances
specifically in the organelles of cells. Thus, these organelles use lipids and
proteins in doing cellular activity and keeps them functioning. Observe
nitrogen and carbon, these two entities are called elements that are composed
of atoms. Elements are the basic composition of a substance. Going back,
examples of molecules could be nucleic tides, polypeptides, RNA, protein,
lipids and etc. </span>
Answer by YourHope:
Facts are based off observations, while theories are based off an account of a phenomenon that may or may not be true!
:)