Q: What is a molecule with two fatty acids and a modified phosphate group attached to a glycerol backbone? Choices: - carbohydrate - polymer - amino acid - phospholipid A:
phospholipid

Q: Where does most of the earth's energy come from? Choices: - magnetic field - its core - its atmosphere - sun A:
sun

Q: What gives a coil of copper wire the ability to conduct electricity well? Choices: - optical bonds - metallic electrons - metallic ions - metallic bonds A:
metallic bonds