1. why does the yeast represent? 7. what is the porpose of the sugar? 3. Why did we use lukewarm water? 4. what was the ph of the sugar solution.5.What did you notice at the surface of the sugar solution when you drop the yeast.6. What happened to the balloon after attaching it to the the test tube? 7. What filled up the balloon? explain your observation. 8. What was the ph of the mixture after removing the balloon?



plss help!!​