2. (a) Why is it important that nutrients are recycled in nature?
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(b) During the nitrogen cycle, nitrogen from the air is converted to nitrates - Leaving Cert Biology - Question 2 - 2017
Question 2
2.
(a) Why is it important that nutrients are recycled in nature?
_________________________________________________________________
(b) During the nitrogen cycle,... show full transcript
Worked Solution & Example Answer:2. (a) Why is it important that nutrients are recycled in nature?
_________________________________________________________________
(b) During the nitrogen cycle, nitrogen from the air is converted to nitrates - Leaving Cert Biology - Question 2 - 2017
Step 1
Why is it important that nutrients are recycled in nature?
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Answer
Nutrient recycling is crucial because it allows nutrients to be reused by other organisms, supporting ecosystem stability and productivity.
Step 2
Of what benefit is this?
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Answer
The conversion of nitrogen (N₂) from the air to nitrates facilitates plant absorption, enabling them to use the nitrogen for growth and development.
Step 3
Name one of these molecules.
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Answer
Nitrates can be formed from nitrite (NO₂⁻), which is derived from ammonia (NH₃).
Step 4
Mention one role of animals, other than as consumers, in the nitrogen cycle.
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Answer
Animals contribute to the nitrogen cycle by excreting nitrogen compounds, which can be recycled into the soil.
Step 5
Name the family of plants which have a symbiotic relationship with nitrogen-fixing bacteria.
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Answer
Legumes are known for their symbiotic relationship with nitrogen-fixing bacteria.
Step 6
What process is responsible for this?
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Answer
The process that keeps the nitrogen in the air constant is called denitrification, where nitrogen compounds are converted back into N₂.
Step 7
What is the role of modern fertilisers in the nitrogen cycle?
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Answer
Modern fertilisers supply nitrate or other forms of usable nitrogen to the soil, enhancing plant growth and productivity.
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