Chemical Reactions
1. What is a chemical reaction?

a chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances known as products. a chemical reaction rearranges the constituent atoms of the reactants to create different substances as products

the answer is c cumulus. cumulus clouds can be seen on a gray and rainy day, because cumulus clouds create thunderstorms. give me brainliest if right.

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.