How do organisms get the energy they need? a. by using the sun's energy to break down food molecules and form chemicals b. by breathing oxygen into the lungs and combining it with carbon dioxide c. by burning food molecules and releasing their energy as heat d. by breaking down food molecules gradually and capturing their chemical energy?

I'd say that it is C. by burning food molecules and releasing their energy as heat

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.

a plastic spoon that has a temperature of 78° f is placed into a bowl of soup that has a temperature of 84° f. which of these correctly describes what will happen?

energy as heat moves from the soup to the spoon.