The Nitrogen Cycle (Leaving Cert Biology): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
Why do plants need nitrogen?
Why do plants need nitrogen?
To make proteins
Where are nitrogen-fixing bacteria found?
Where are nitrogen-fixing bacteria found?
In nodules on roots of legumes
What do nitrogen-fixing bacteria convert nitrogen gas into?
What do nitrogen-fixing bacteria convert nitrogen gas into?
Nitrates
Which of these is an example of a legume?
Which of these is an example of a legume?
Peas
What do plants use nitrates to make?
What do plants use nitrates to make?
Proteins
What type of relationship exists between nitrogen-fixing bacteria and plants?
What type of relationship exists between nitrogen-fixing bacteria and plants?
Mutualistic
What is mutualism?
What is mutualism?
Both organisms benefit
How do animals obtain nitrogen?
How do animals obtain nitrogen?
By eating plants & assimilating proteins
What does decomposition of dead plants and animals release into the soil?
What does decomposition of dead plants and animals release into the soil?
Ammonia
What do nitrifying bacteria convert ammonia into first?
What do nitrifying bacteria convert ammonia into first?
Nitrites
What do denitrifying bacteria do?
What do denitrifying bacteria do?
Convert nitrates to nitrogen gas
What is symbiosis?
What is symbiosis?
Two species living together closely