(Q).
Q: What makes organic compounds ubiquitous is the chemistry of their what? Choices: - carbon shell - dioxide shell - dioxide core - carbon core A:
(A).
carbon core

(Q).
Q: There are only four possible bases that make up each dna nucleotide: adenine, guanine, thymine, and? Choices: - taurine - phenylalanine - guarine - cytosine A:
(A).
cytosine

(Q).
Q: What are identified by the azimuthal quantum number? Choices: - ionic-energy level - covalent bonds - radioactivity - energy levels - sub-energy levels A:
(A).
sub-energy levels