Which of the following describes the role of nitrogen-fixing bacteria in the nitrogen cycle? Nitrogen-fixing bacteria convert....

Animals obtain the nitrogen they need directly from the

Organisms require nitrogen to make which of the following?

Nitrogen fixation involves nitrogen from which of the following sources?

Which group of bacteria convert ammonium ions to Nitrite and Nitrate ions?

Which group of bacteria convert nitrogen gas in to ammonium ions?

Which group of bacteria require aerobic conditions in order to oxidise nitrites to nitrates?

Which group of plants contain symbiotic nitrogen fixing bacteria?

Which of the following do not contain nitrogen atoms?

What is the source of nitrogen for denitrifying bacteria?

Which group of bacteria are adapted to living in anoxic waterlogged soils, "stripping" the oxygen from nitrates and releasing nitrogen gas?

Would a woodlouse be considered a 'decomposer' or a 'saprotroph'?

Which is the correct formula for ammonium ions?

Which of the following species of bacteria is a nitrifier?

Which of the following species can be found in the root nodules of leguminous plants and is involved in nitrogen-fixation?

Which of the following species is NOT a nitrifying bacterial species?

Which is the best statement?

Is the nitrification of ammonium ions to nitrite ions a reduction or oxidation reaction?

Which is the correct sequence of chemical changes that occurs during nitrification?