Why is the Huronian Supergroup rock formation particularly interesting to scientists?

A .because it looks like a cross-section of a giant, stone encyclopedia

B .because it formed during the period when oxygen began to accumulate in the atmosphere

C .because it contains unusually large amounts of oxygen and sulfur

D .because it formed during the period when oxygen began to accumulate in the atmosphere

B and D are the same answer..

It's B and D I suppose either one works

Explanation:

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion

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.