In a market economy, supply and demand are important because they a. are direct policy tools used by government agencies to regulate the economy. b. illustrate when an market is in equilibrium, but they are not helpful when a market is out of equilibrium. c. can be used to predict the impact on the economy of various events and policies. d. All of the above are correct.

Asolution of an enzyme and a substrate was placed in a water bath and the temperature of the reaction was raised gradually. the graph shown was plotted at the end of the experiment. what can be concluded from the graph? a) temperature has no effect on the activity of the enzyme. b) the effect of temperature on the enzyme is unpredictable. c) the enzyme shows increased activity up to a certain temperature. d) the activity of the enzyme is inversely proportional to the temperature.

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b.diffusion c. endocytosis d. exocytosisc. endocytosis

Which of the following shows the results that you would get if you tested beef using the four tests in the gizmo