In this lab, you will figure out who was guilty of the classroom food mess by determining which macromolecules are present in the mystery food sample.
rephrase this statement as a scientific question you can answer through investigation.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

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.