Regarding the elemental composition of living and non-living matter, which statements are accurate?
a. All elements present in a sample of the earth’s crust are also present in a sample of living tissue.
b. The relative abundance of carbon and hydrogen is higher in the earth’s crust than in living organisms.
c. In absolute terms, there are no differences in the list of elements between living and non-living matter.
d. Nitrogen is present in very little quantity in the earth’s crust but is significantly higher in the human body.
e. Oxygen is the most abundant element by weight in both the human body and the earth’s crust.
f. Silicon is abundant in the earth’s crust but is negligible in the human body.
g. Calcium is more abundant in the earth’s crust than in the human body.
