Answer:
Erwin Chargaff
Explanation:
Erwin Chargaff found that in DNA, the ratios of adenine (A) to thymine (T) and guanine (G) to cytosine (C) are equal.
(dnalc.cshl.edu)
These base pair relationships are often called Chargaff's rules of DNA base pairing, named after the Columbia University scientists who observed that there are equal molar concentration of A & T, as well as G & C in most DNA molecules.
our water pipes, and the led in some water sources.
d
Because you need the cell to become tissue then the tissue Becomes organs then a bunch of organs become a organ system
