Amino acids are the monomers (individual molecules) which make up the macro-molecule, protein.
There are three major types of blood vessels: the arteries, which carry the blood away from the heart; thecapillaries, which enable the actual exchange of water and chemicals between the blood and the tissues; and the veins, which carry blood from the capillaries back toward the heart.
Answer:
Effective food supply was most likely an effect on society that resulted from improvements in blood handling during World War I and World War II.
Explanation:
Answer: B
Explanation: The other answers are talking about similarities among different species.
