Which of the following is/are true about the greenhouse effect?
a. greenhouse gases redirect infrared radiation back to the earth
b. the greenhouse effect is defined primarily as the phenomenon that prevents ultraviolet light from reaching the earth
c. it is something that did not exist before humans started using fossil fuels
d. none of these

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.

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

3what is the range of the function shownin the graph? ucation solutionsnw novo-9-8-7 -6 -5 -4 -3 -2 -1123456789