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What role do bacteria play in the nitrogen cycle?
- a)They break down organic materials
- b)They fix nitrogen from the air into the soil
- c)They convert nitrogen into ammonia
- d)They increase soil acidity
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
What role do bacteria play in the nitrogen cycle?a)They break down org...
Certain bacteria fix nitrogen from the atmosphere into the soil, making it available as a nutrient for plants. This process is essential for maintaining soil fertility and supporting plant growth.
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What role do bacteria play in the nitrogen cycle?a)They break down org...
Role of Bacteria in the Nitrogen Cycle:
Nitrogen is an essential element for the growth and development of plants. However, plants cannot directly use atmospheric nitrogen (N2) in this form. Bacteria play a crucial role in the nitrogen cycle by converting atmospheric nitrogen into a form that plants can absorb and utilize.
Nitrogen Fixation:
- Bacteria known as nitrogen-fixing bacteria have the ability to convert atmospheric nitrogen (N2) into ammonia (NH3) through a process called nitrogen fixation.
- These bacteria form symbiotic relationships with certain plants, such as legumes, where they reside in nodules on the plant roots and provide them with ammonia, which the plants use for growth.
Conversion to Ammonia:
- Once nitrogen-fixing bacteria convert atmospheric nitrogen into ammonia, other bacteria in the soil, known as nitrifying bacteria, further convert ammonia into nitrites and then nitrates.
- These nitrates are then taken up by plants to synthesize proteins and other essential molecules.
Role in Soil Fertility:
- The presence of nitrogen-fixing bacteria in the soil helps to increase soil fertility by providing plants with a readily available source of nitrogen for their growth.
- This process also helps to reduce the need for synthetic nitrogen fertilizers, which can have detrimental effects on the environment.
In conclusion, bacteria play a crucial role in the nitrogen cycle by fixing atmospheric nitrogen into a form that plants can use, thereby promoting plant growth, soil fertility, and overall ecosystem health.
Nitrogen is an essential element for the growth and development of plants. However, plants cannot directly use atmospheric nitrogen (N2) in this form. Bacteria play a crucial role in the nitrogen cycle by converting atmospheric nitrogen into a form that plants can absorb and utilize.
Nitrogen Fixation:
- Bacteria known as nitrogen-fixing bacteria have the ability to convert atmospheric nitrogen (N2) into ammonia (NH3) through a process called nitrogen fixation.
- These bacteria form symbiotic relationships with certain plants, such as legumes, where they reside in nodules on the plant roots and provide them with ammonia, which the plants use for growth.
Conversion to Ammonia:
- Once nitrogen-fixing bacteria convert atmospheric nitrogen into ammonia, other bacteria in the soil, known as nitrifying bacteria, further convert ammonia into nitrites and then nitrates.
- These nitrates are then taken up by plants to synthesize proteins and other essential molecules.
Role in Soil Fertility:
- The presence of nitrogen-fixing bacteria in the soil helps to increase soil fertility by providing plants with a readily available source of nitrogen for their growth.
- This process also helps to reduce the need for synthetic nitrogen fertilizers, which can have detrimental effects on the environment.
In conclusion, bacteria play a crucial role in the nitrogen cycle by fixing atmospheric nitrogen into a form that plants can use, thereby promoting plant growth, soil fertility, and overall ecosystem health.
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