The diagram shows a simple lipid. What type of lipid is shown?
O saturated
O unsaturated
O phospholipid
O triglyceride

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

trachea, alveoli, lung capillaries, arteries