Human pollution of oceans threatens the growth of algae and other protists that live there. The loss of these microscopic organisms most likely affects the health of the environment and its ability to support life because these organisms —

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.