13. When one organism lives inside the body of another and both benefit, the relationship is called
22. The Miller-Urey experiment demonstrated that
A. organic molecules first could have come to Earth on a meteorite.
B. iron-sulfide bubbles may have acted as the first cell membranes.
C. liposome membranes containing organic molecules preceded true cells.
D. energy from lightning might have helped create Earth's first organic molecules.
25. During which era did the dinosaur population peak?
i really need help with these so any help is much wanted and good. thanks =]Tags: organism lives, D. Precambrian, Help