Write a short paragraph that uses the following key terms: ecosystem productivity, gross primary productivity, net primary productivity, energy, biomass, energy transfer efficiency, and trophic level.

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.

Can someone me with this question/ give me the answer? you!

Osmosis requires? a- all of the above b- a selectively permeable membrane c- none, it does not involve water d- water e- a concentration gradient between solutes and water