C. Amino Acids (Biuret solution)
I think the answer would be white blood cells because the white blood cells are trying to fight the bacteria off. That’s what I think. Hope this helped
The pulmonary vein carries oxygenated blood from the lungs to the left atrium
This is refered to as the chemical symbol. It is derived from the Latin name for the element which is why some elements like potassium (K) and sodium (N) have symbols different from their name on the periodic table.
D. is the correct answer. It uses neurons to signal.
