CHAPTER 15-1 (page 369-372) A. Theory B. Fossil C. Evolution
1. Preserved remains or evidence of an ancient organism.

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the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.

i'd have to say the answer is probable the second option "the geosphere interacting with the atmosphere"