Which of the following is most likely to yield the fossils that scientists reconstruct the earth's biological history?
a.
sedimentary rock
b.
evidence of folds
c.
samples of igneous rock
d.
metamorphic rock

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides