The 11th class. Exam in Biology. (After the choice of which)

The biologist came overwhelmed and at the beginning of the exam dropped, leaving the teacher under the control of OBŽ.

I have two questions on the ticket. The first I do not remember, and the second "use of microorganisms in the people's economy". Well, I pretended, ready to answer without preparation. The man says, wait.

I wait. There is no biological teacher. He says, go and answer. I fit. I tell you how to use yeast for the production of самогоon. (My grandfather was able to do that.) All the technology was told. He did not even hear about the production of biogas from fertilizer. Go to Five...