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.

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.