For what reasons could a theory be changed or replaced? Check all that apply.
New technology is developed that provides more information about the theory.
New experimental methods are designed to test a theory.
A new, untested hypothesis is proposed.
New information is discovered that does not support the theory.
A single experiment produces results that differ from all previous experiments.

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.