Index fossils are fossils that are preserved in the rock record of the Earth and are specifically found in a particular time period or environment. These fossils are also called, guide fossils. What can the index fossils tell you about the organisms in the layers of rock with therm, above them, or below them?

answer; (phospholipid);

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.