Which cannot be broken down into smaller parts ? a. compounds b. elements c. macromolecules d. water

This is what i found on google “when one phosphate group is removed by breaking a phosphoanhydride bond in a process called hydrolysis, energy is released, and atp is converted to adenosine diphosphate (adp). likewise, energy is also released when a phosphate is removed from adp to form adenosine monophosphate (amp).” i hope this you .

They carry out the exchange of gases as we breathe ( oxygen and carbon dioxide).

Adozen is 1221/12 = 1.751.75 x 12 = 21therefore, 1.75 is the answer.

The answer for this question is d. none of these