James took two pea plants, placing one in a dark closet and the other on a sunny window sill. both are located in air conditioned rooms. he then measured
the growth of the pea plants after a week. in this experiment sunlight is a(n)

a. independent variable

b. constant

c. dependent variable

d. control

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.

Answerit is comparative because this experiment is comparing the results of the volume at minimal pressure and then increases it; ; ;