A-LevelBiologyBiodiversity and conservation9700/12 · May/June 2014 · Q401 Mark

A gardener has a waterlogged garden showing poor growth. He decides to drain it in an attempt to reduce the numbers of some harmful bacteria. Which type of bacteria would he be attempting to reduce in number?

Adecomposing

Bdenitrifying

Cnitrifying

Dnitrogen fixing

✓ Correct answer

B: denitrifying

Oracle Prep sorts past-paper questions by topic, so you can drill Biodiversity and conservation and see which topics are most likely to come up next.

Topic: Biodiversity and conservation, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2014 Paper 1 Variant 2, question 40.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

The passage below outlines one method used by a student to estimate the population size of an animal species. Complet…

The natural ecosystem on Hawadax Island in Alaska was disrupted in the 1780s when brown rats, Rattus norvegicus, swam…

A tree carries out photosynthesis and provides organic compounds for other organisms in a forest. It takes carbon dio…

Cardiovascular disease is said to be multifactorial. What does this mean?

Which row shows a correct location of cartilage and smooth muscle in the human gas exchange system?

Which observation would indicate a difference between the structure of the gas exchange system of a cigarette smoker …