Which best describes the cell theory? a. scientists know all there is to know about cells, so the cell theory will not change. b. as technological advancements are made, the cells theory may change. c. a theory, once formulated, can not be change. d. the development of a synthetic cell has caused the cell to change.

Which of the following statements best distinguishes a hypothesis from a theory? a. theories are hypotheses that have been proved. b. hypotheses are guesses; theories are correct answers c. hypotheses usually are relatively narrow in scope; theories have broad explanatory power. d. theories are proved to be true; hypotheses are often contradicted by experimental results.