Which is the best definition of a solution? a. a solution is any two liquids mixed. b. a solution is two gases mixed together. c. a solution is the same as a mixture. d. a solution is a mixture that has the same composition throughout.

The Answer is D

A is a mixture
B is a gaseous mixture
C is relating to a mixture
D describes a solution ((which basically is a combination of 2 or more elements with identical composition throughout))

Ithink the answer would be a

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.