A class grows microorganisms collected from tree bark on nutrient agar. One plate is accidentally incubated at 37 °C instead of 25 °C.
Why should the students leave this plate sealed and give it to the technician?
The warmer conditions may prevent pathogens growing because they are adapted to cooler environments.
The warmer conditions may change harmless bacteria into pathogens during binary fission.
The warmer conditions may kill harmless bacteria while pathogens remain unaffected.
The warmer conditions may favour microorganisms that also grow well inside the human body.
282 exam-style questions on AQA GCSE Biology 1.1 Cell structure, covering 1.1.1 Eukaryotes and prokaryotes, 1.1.2 Animal and plant cells, 1.1.3 Cell specialisation, 1.1.4 Cell differentiation, 1.1.5 Microscopy, and 1.1.6 Culturing microorganisms. Each one has a worked solution and a mark scheme showing where the marks go.