2. a) When baking bread, what product of fermentation cause s the dough to rise? 3. a) Based on your experiment, which sugars (glucose, successfully use to make the dough rise when baking bread? Why' sucrose, lactose or starch) could you b) Provide a biological reason for why yeast cannot use certain sugars for fermenta Lichens can often survive in very harsh environments that most other organisms cannot tolerate. Wh 4. at characteristics of lichens allow them to survive in such environments?