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Which of the following statements regarding biofertilizers and their symbiotic associations is incorrect?
- a)Glomus is a genus of cyanobacteria that forms symbiotic associations with plants, aiding phosphorus absorption.
- b)Azospirillum and Azotobacter are bacteria that fix atmospheric nitrogen while living freely in the soil, enriching the nitrogen content.
- c)Rhizobium forms nodules on the roots of leguminous plants and fixes atmospheric nitrogen into organic forms.
- d)Cyanobacteria, such as Anabaena and Nostoc, are widely distributed in aquatic and terrestrial environments and can fix atmospheric nitrogen.
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Which of the following statements regarding biofertilizers and their s...
The incorrect statement is Glomus is not a genus of cyanobacteria but a type of fungus that forms symbiotic relationships (mycorrhiza) with plants, helping in the absorption of phosphorus. Cyanobacteria, on the other hand, like Anabaena and Nostoc, are known for nitrogen fixation, especially in environments like paddy fields.
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Most Upvoted Answer
Which of the following statements regarding biofertilizers and their s...
Incorrect Statements:
(i) Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial habitats.
(ii) Anabaena, Nostoc, and Oscillatoria are photosynthetic N2-fixing cyanobacteria.
(iii) Tolypothrix (BGA) can increase rice production by about 20%.
(iv) BGA adds organic matter to the soil and increases its fertility.
(v) In our country, fertilizers are not available commercially in the markets for farmers.
Explanation:
(i) Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial habitats.
This statement is correct. Cyanobacteria are photosynthetic bacteria that can produce their own food through photosynthesis. They are found in diverse habitats such as freshwater, marine environments, soil, and even in extreme conditions like hot springs and deserts.
(ii) Anabaena, Nostoc, and Oscillatoria are photosynthetic N2-fixing cyanobacteria.
This statement is incorrect. Anabaena, Nostoc, and Oscillatoria are indeed photosynthetic cyanobacteria, but they are not N2-fixing cyanobacteria. The N2-fixing cyanobacteria include genera like Anabaena, Nostoc, and Calothrix.
(iii) Tolypothrix (BGA) can increase rice production by about 20%.
This statement is correct. Blue-green algae (BGA) or cyanobacteria belonging to the genus Tolypothrix can indeed increase rice production by about 20%. They have a symbiotic association with certain plants, including rice. The cyanobacteria fix atmospheric nitrogen and provide it to the plants, thereby enhancing their growth and productivity.
(iv) BGA adds organic matter to the soil and increases its fertility.
This statement is correct. Blue-green algae or cyanobacteria can add organic matter to the soil through their growth and decay. They fix atmospheric nitrogen, which gets incorporated into the organic matter. This enhances the fertility of the soil, as nitrogen is an essential nutrient for plant growth.
(v) In our country, fertilizers are not available commercially in the markets for farmers.
This statement is incorrect. Fertilizers are widely available commercially in the markets for farmers in most countries, including India. Fertilizers are essential for enhancing crop productivity by providing essential nutrients to the plants. They are available in various formulations and can be purchased by farmers to meet the nutrient requirements of their crops.
Therefore, the incorrect statement is option (v) only.
(i) Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial habitats.
(ii) Anabaena, Nostoc, and Oscillatoria are photosynthetic N2-fixing cyanobacteria.
(iii) Tolypothrix (BGA) can increase rice production by about 20%.
(iv) BGA adds organic matter to the soil and increases its fertility.
(v) In our country, fertilizers are not available commercially in the markets for farmers.
Explanation:
(i) Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial habitats.
This statement is correct. Cyanobacteria are photosynthetic bacteria that can produce their own food through photosynthesis. They are found in diverse habitats such as freshwater, marine environments, soil, and even in extreme conditions like hot springs and deserts.
(ii) Anabaena, Nostoc, and Oscillatoria are photosynthetic N2-fixing cyanobacteria.
This statement is incorrect. Anabaena, Nostoc, and Oscillatoria are indeed photosynthetic cyanobacteria, but they are not N2-fixing cyanobacteria. The N2-fixing cyanobacteria include genera like Anabaena, Nostoc, and Calothrix.
(iii) Tolypothrix (BGA) can increase rice production by about 20%.
This statement is correct. Blue-green algae (BGA) or cyanobacteria belonging to the genus Tolypothrix can indeed increase rice production by about 20%. They have a symbiotic association with certain plants, including rice. The cyanobacteria fix atmospheric nitrogen and provide it to the plants, thereby enhancing their growth and productivity.
(iv) BGA adds organic matter to the soil and increases its fertility.
This statement is correct. Blue-green algae or cyanobacteria can add organic matter to the soil through their growth and decay. They fix atmospheric nitrogen, which gets incorporated into the organic matter. This enhances the fertility of the soil, as nitrogen is an essential nutrient for plant growth.
(v) In our country, fertilizers are not available commercially in the markets for farmers.
This statement is incorrect. Fertilizers are widely available commercially in the markets for farmers in most countries, including India. Fertilizers are essential for enhancing crop productivity by providing essential nutrients to the plants. They are available in various formulations and can be purchased by farmers to meet the nutrient requirements of their crops.
Therefore, the incorrect statement is option (v) only.
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Which of the following statements regarding biofertilizers and their symbiotic associations is incorrect?a)Glomus is a genus of cyanobacteria that forms symbiotic associations with plants, aiding phosphorus absorption.b)Azospirillum and Azotobacter are bacteria that fix atmospheric nitrogen while living freely in the soil, enriching the nitrogen content.c)Rhizobium forms nodules on the roots of leguminous plants and fixes atmospheric nitrogen into organic forms.d)Cyanobacteria, such as Anabaena and Nostoc, are widely distributed in aquatic and terrestrial environments and can fix atmospheric nitrogen.Correct answer is option 'A'. Can you explain this answer?
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Which of the following statements regarding biofertilizers and their symbiotic associations is incorrect?a)Glomus is a genus of cyanobacteria that forms symbiotic associations with plants, aiding phosphorus absorption.b)Azospirillum and Azotobacter are bacteria that fix atmospheric nitrogen while living freely in the soil, enriching the nitrogen content.c)Rhizobium forms nodules on the roots of leguminous plants and fixes atmospheric nitrogen into organic forms.d)Cyanobacteria, such as Anabaena and Nostoc, are widely distributed in aquatic and terrestrial environments and can fix atmospheric nitrogen.Correct answer is option 'A'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following statements regarding biofertilizers and their symbiotic associations is incorrect?a)Glomus is a genus of cyanobacteria that forms symbiotic associations with plants, aiding phosphorus absorption.b)Azospirillum and Azotobacter are bacteria that fix atmospheric nitrogen while living freely in the soil, enriching the nitrogen content.c)Rhizobium forms nodules on the roots of leguminous plants and fixes atmospheric nitrogen into organic forms.d)Cyanobacteria, such as Anabaena and Nostoc, are widely distributed in aquatic and terrestrial environments and can fix atmospheric nitrogen.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements regarding biofertilizers and their symbiotic associations is incorrect?a)Glomus is a genus of cyanobacteria that forms symbiotic associations with plants, aiding phosphorus absorption.b)Azospirillum and Azotobacter are bacteria that fix atmospheric nitrogen while living freely in the soil, enriching the nitrogen content.c)Rhizobium forms nodules on the roots of leguminous plants and fixes atmospheric nitrogen into organic forms.d)Cyanobacteria, such as Anabaena and Nostoc, are widely distributed in aquatic and terrestrial environments and can fix atmospheric nitrogen.Correct answer is option 'A'. Can you explain this answer?.
Which of the following statements regarding biofertilizers and their symbiotic associations is incorrect?a)Glomus is a genus of cyanobacteria that forms symbiotic associations with plants, aiding phosphorus absorption.b)Azospirillum and Azotobacter are bacteria that fix atmospheric nitrogen while living freely in the soil, enriching the nitrogen content.c)Rhizobium forms nodules on the roots of leguminous plants and fixes atmospheric nitrogen into organic forms.d)Cyanobacteria, such as Anabaena and Nostoc, are widely distributed in aquatic and terrestrial environments and can fix atmospheric nitrogen.Correct answer is option 'A'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following statements regarding biofertilizers and their symbiotic associations is incorrect?a)Glomus is a genus of cyanobacteria that forms symbiotic associations with plants, aiding phosphorus absorption.b)Azospirillum and Azotobacter are bacteria that fix atmospheric nitrogen while living freely in the soil, enriching the nitrogen content.c)Rhizobium forms nodules on the roots of leguminous plants and fixes atmospheric nitrogen into organic forms.d)Cyanobacteria, such as Anabaena and Nostoc, are widely distributed in aquatic and terrestrial environments and can fix atmospheric nitrogen.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements regarding biofertilizers and their symbiotic associations is incorrect?a)Glomus is a genus of cyanobacteria that forms symbiotic associations with plants, aiding phosphorus absorption.b)Azospirillum and Azotobacter are bacteria that fix atmospheric nitrogen while living freely in the soil, enriching the nitrogen content.c)Rhizobium forms nodules on the roots of leguminous plants and fixes atmospheric nitrogen into organic forms.d)Cyanobacteria, such as Anabaena and Nostoc, are widely distributed in aquatic and terrestrial environments and can fix atmospheric nitrogen.Correct answer is option 'A'. Can you explain this answer?.
Solutions for Which of the following statements regarding biofertilizers and their symbiotic associations is incorrect?a)Glomus is a genus of cyanobacteria that forms symbiotic associations with plants, aiding phosphorus absorption.b)Azospirillum and Azotobacter are bacteria that fix atmospheric nitrogen while living freely in the soil, enriching the nitrogen content.c)Rhizobium forms nodules on the roots of leguminous plants and fixes atmospheric nitrogen into organic forms.d)Cyanobacteria, such as Anabaena and Nostoc, are widely distributed in aquatic and terrestrial environments and can fix atmospheric nitrogen.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET.
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ample number of questions to practice Which of the following statements regarding biofertilizers and their symbiotic associations is incorrect?a)Glomus is a genus of cyanobacteria that forms symbiotic associations with plants, aiding phosphorus absorption.b)Azospirillum and Azotobacter are bacteria that fix atmospheric nitrogen while living freely in the soil, enriching the nitrogen content.c)Rhizobium forms nodules on the roots of leguminous plants and fixes atmospheric nitrogen into organic forms.d)Cyanobacteria, such as Anabaena and Nostoc, are widely distributed in aquatic and terrestrial environments and can fix atmospheric nitrogen.Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice NEET tests.
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