Question

1.which statement is true regarding similarties and differences between aerobic and anaerobic respiration?
2. the absence of which substance causes a switch from aerobic to anaerobic respiration?
3.one student claims that yogurt is made by lactic acid fermentation. another claims that yogurt is made by alcoholic fermentation. testing for which of the following substances could help determine whether alcholic fermentation or lactic acid fermentation was going on?
4. all of the following are sources of energy for humans during exercise except?