What process may cause lactic acid to form?

a) aerobic respiration
b) anaerobic respiration
c) photosynthesis
d) photolysis

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;