Answer:
C. Different conditions support different organisms
Maybe to help gain knowledge about what's out there so our poor little earth doesn't get the official knock out. Or help prevent it they are earth rescuers!! :) help this helps! Stay groovy.
Most organisms can tolerate a very narrow pH range close to neutral, i.e., around pH 7. It is likely that there would not be much life in the lake at pH 3. Once the pH increases to above 5.5 to 6, it is more likely that life would begin to survive. Once the pH rises to above around 9, the solution is starting to become basic, and once again, few organisms will survive.
Answer:
The correct answer is D) Rate of fermentation.
Explanation:
Carbohydrates are fermented by yeast to form alcohol by alcoholic fermentation.
Now if the effects of different carbohydrate molecules are tested on yeast then the yeast will ferment different sugar molecules at different rate.
As a result the rate of fermentation will be the independent variable of the experiment.