Inner core, outer core, mantle, crust
Answer: A: by breaking ans reforming chemical bonds in the molecules
Explanation: There is energy stored in chemical bonds between food molecules (this is referred to as ATP, or Adenosine TriPhosphate, which is the type of energy your body uses). When chemical bonds are created, some energy is stored in those bonds (personally, I like to think that it's because the bonds need energy to stay bonded, but there is no science to prove this). When one of these bonds are broken, the energy that was stored is released, and can then be used by your body. Your body then uses a different type of energy (called ADP, or Adenosine DiPhosphate) to reform the bonds, which then go on to become waste products.
Transcription of the operon by RNA polymerase would not stop. This would, therefore, keep the genes in the operon
activated without repression. β-galactosidase, lactose permease, and lactose transacetylase enzymes would still
be produced by the bacteria even in a non-lactose medium.