5.Which is the first step in photosynthesis?. a. the production of ATP
b. the absorption of light
c. the production of NADPH
d. None of the above

Which direction does the energy flow in this energy pyramid ?

According to the cell theory, which describes cells? a. all organisms are composed of multiple cells. b. all cells have the same structure and function. c. cells are found in everything on earth. d. living organisms are not created spontaneously

During an experiment, readings for blood pressure in a persons body were found to be constant . however , when he measured by a different blood pressure cuff , the readings differed by 15 points for each reading. this difference indicates that the results are