PLEASE HELP WILL MARK BRAINLEST!! 1.Rank the test tubes in order of greatest amount of digestion to least amount of digestion. For each tube,
explain why it would have exhibited that level of digestion.

2. how could the experiment be modified to further test human digestion actions? what variable would you change? what would you keep the same?

3. in which test tube was the activity most like that of a real human stomach? explain.

Why are carbon dioxide concentrations expected to increase? a carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase b. carbon dioxide concentrations are expected to increase, because of an increase in agriculture. c. carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use. d. all of the above select the best answer from the choices provided mark this and return save and exit next submit submit