6. the organic compounds in living things are organized into groups: carbohydrates, lipids, proteins, and nucleic acids. which two groups of compounds do living things most commonly use as an energy source?
(a carbohydrates and lipids)
b proteins and nucleic acids
c proteins and carbohydrates
d lipids and nucleic acids

7. which statement is true about the cells in multicell organisms?
(a they usually have certain special functions. )
b they are prokaryotic cells.
c they can all turn into the same kind of cell if needed.
d they are all identical.

8. which statement about energy is true for all living things?
a energy comes only from sunlight.
b plants convert atp into glucose for energy.
(c organisms require energy for survival.)
d energy cannot be transferred from one organism to another.