Penicillin is produced commercially in fermenters.

Penicillin is a substance that kills bacteria.

What is the name given to substances that kill bacteria?

Name the type of microorganism that produces penicillin.

The graph shows changes in glucose concentration, oxygen concentration, and penicillin concentration inside the fermenter during the production of penicillin.

State the day in which the production of penicillin was fastest.

Describe how the concentration of glucose in the fermenter changes on the first day.

Farming techniques have evolved in the last decades.

Give three reasons why more land is being used for farming.

Describe how increased farming has decreased biodiversity and increased atmospheric pollution.

Scientists are increasingly concerned about food security.

Which of the following statements correctly describes food security?

Which of these would improve food security?

Explain how a large increase in the mass of meat eaten will decrease food security in the future.

Some areas in developing countries are used to grow crops that cannot be eaten by people.

The crops are used to produce biofuel.

Describe the advantages and disadvantages of growing these crops to produce biofuel.