Why are leaves green?
because they contain chlorophyll, which reflects wavelengths of light in the red range?
because they contain chlorophyll, which absorbs wavelengths of light in the green range?
because they contain chlorophyll, which reflects wavelengths of light in the green range?

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.

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.

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called