Hormones and secretions of the nervous system are chemical messengers that: A. store genetic information

B. carry out the circulation of materials

C. extract energy from nutrients

D. coordinate system interactions​

D i believe

If you think about it, they tell different parts of your body what to do. Hope this helps you!

Hormones and secretions of the nervous system are chemical messengers that:

D. coordinate system interactions

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.