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Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?
- a)By cyanobacteria
- b)By electrical discharges in the atmosphere
- c)By industrially synthesised fertilizer
- d)By denitrification
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
Nitrogen is fixed in ecosystems in ways stated below. Which one of the...
False statement: By denitrification
Explanation:
Nitrogen is an essential element for the growth and survival of living organisms. It is an abundant gas that makes up 78% of the Earth's atmosphere, but it cannot be used by most organisms in this form. Nitrogen fixation is the process of converting atmospheric nitrogen into a form that can be used by plants and other organisms.
Below are the ways nitrogen is fixed in ecosystems:
By Cyanobacteria:
Cyanobacteria are a group of photosynthetic bacteria that are capable of fixing atmospheric nitrogen into a usable form. They are found in aquatic environments such as oceans, lakes, and rivers, as well as in soil.
By Electrical Discharges in the Atmosphere:
Lightning and other electrical discharges in the atmosphere can convert atmospheric nitrogen into nitrate and nitrite compounds that can be used by plants and other organisms.
By Industrially Synthesized Fertilizer:
Industrially synthesized fertilizers are made by combining atmospheric nitrogen with hydrogen to form ammonia. This ammonia is then reacted with other compounds to form nitrogen-containing fertilizers such as urea.
By Denitrification:
Denitrification is the process by which bacteria convert nitrate and nitrite compounds back into atmospheric nitrogen. This process occurs in anaerobic conditions, such as in wetlands and soils, and can lead to a loss of available nitrogen for plants and other organisms.
Therefore, the false statement is option D, as denitrification is not a process of fixing nitrogen, but rather a process of returning nitrogen to the atmosphere.
Explanation:
Nitrogen is an essential element for the growth and survival of living organisms. It is an abundant gas that makes up 78% of the Earth's atmosphere, but it cannot be used by most organisms in this form. Nitrogen fixation is the process of converting atmospheric nitrogen into a form that can be used by plants and other organisms.
Below are the ways nitrogen is fixed in ecosystems:
By Cyanobacteria:
Cyanobacteria are a group of photosynthetic bacteria that are capable of fixing atmospheric nitrogen into a usable form. They are found in aquatic environments such as oceans, lakes, and rivers, as well as in soil.
By Electrical Discharges in the Atmosphere:
Lightning and other electrical discharges in the atmosphere can convert atmospheric nitrogen into nitrate and nitrite compounds that can be used by plants and other organisms.
By Industrially Synthesized Fertilizer:
Industrially synthesized fertilizers are made by combining atmospheric nitrogen with hydrogen to form ammonia. This ammonia is then reacted with other compounds to form nitrogen-containing fertilizers such as urea.
By Denitrification:
Denitrification is the process by which bacteria convert nitrate and nitrite compounds back into atmospheric nitrogen. This process occurs in anaerobic conditions, such as in wetlands and soils, and can lead to a loss of available nitrogen for plants and other organisms.
Therefore, the false statement is option D, as denitrification is not a process of fixing nitrogen, but rather a process of returning nitrogen to the atmosphere.
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Nitrogen is fixed in ecosystems in ways stated below. Which one of the...
Dentrification is a procee by which nitrate convert in N2 . By pseuduomonas and thiobacillus bacteria. So that why it is not process by nitrogen is fix in atmosphere. It is given in ncert in class 11. Mineral nutriton chapter ma.
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Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?a)By cyanobacteriab)By electrical discharges in the atmospherec)By industrially synthesised fertilizerd)By denitrificationCorrect answer is option 'D'. Can you explain this answer?
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