How are sieve tubes adapted to their function

What are levels of ecology and how can we remember them

What part of the body contains bile, an enzyme that break down lipids?

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.