The Miller-Urey experiment demostrated that

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energy from lightning might have helped create Earth's firs organic molecules

liposome membranes containing organic molecules preceded true cells

organic molecules first could have come to Earth on a meteorite

iron-sulfide bubbles may have acted as the first cell membranes

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igneous rock formed from below the surface would have more crystals because

answer: because magma cools more slowly than lava

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only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.