A change in the color of a substance -- this one is indeed a chemical change. Think of iron, if iron turns reddish, it's a completely different substance.
A threadlike strucure of nucleic acid
Cardiac muscles are involuntary
Answer:
d. A centrifuged sample of blood would yield a composition of 45% plasma and 55% cells
Explanation:
Blood is a mixture of plasma and formed elements. Plasma consists of the fluid portion of the blood and approximately makes up 55 percent of the blood. On the other hand, the formed elements are the red blood cells, white blood cells, and platelets which make up about 45 percent of blood.
