In my opinion the answer would be A.
C. Is the answer love....
<span>Thinking of the layers of the earths crust, it would be expected that the mantle is rich in minerals that contain heavy metals such as iron and nickel.</span>
Amino acids. These class of compounds
are considered the building blocks of most organisms, and around 500 of these
are known and indentified. All proteins, carbohydrates, and nucleic acids are
polymers ("many units") and each unit is an amino acid.
Saphrophytic nutrition is all about obtaining nutrients from non-living organic matter, usually dead and decaying plant or animal matter, by absorbing soluble organic compounds.
