How does a hypothesis become a theory?
a. the hypothesis is published in a peer-reviewed journal.
b. the hypothesis is repeatedly supported by many experiments.
c. the hypothesis is proven using a single experiment.
d. the hypothesis is made by a famous scientist.

During the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.