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Biological Nitrogen Fixation Video Lecture - NEET
FAQs on Biological Nitrogen Fixation Video Lecture - NEET
| 1. What is biological nitrogen fixation? |  |
Ans. Biological nitrogen fixation is the process by which certain microorganisms convert atmospheric nitrogen (N2) into a usable form of nitrogen, such as ammonia (NH3) or nitrate (NO3-). This process is vital for maintaining the nitrogen cycle and providing plants with the necessary nutrients for growth.
| 2. Which microorganisms are involved in biological nitrogen fixation? | |
Ans. Several types of microorganisms are capable of biological nitrogen fixation. The most well-known are the nitrogen-fixing bacteria, which include both free-living bacteria, such as Azotobacter and Azospirillum, and symbiotic bacteria, such as Rhizobium found in legume root nodules. Additionally, certain cyanobacteria and some archaea also possess the ability to fix nitrogen.
| 3. How does biological nitrogen fixation contribute to agriculture and the environment? | |
Ans. Biological nitrogen fixation plays a crucial role in agriculture as it reduces the dependence on synthetic fertilizers. Nitrogen-fixing bacteria establish symbiotic relationships with legumes, such as soybeans and peas, providing them with a natural source of nitrogen. This reduces the need for nitrogen-based fertilizers, which can be costly and have negative environmental impacts, such as water pollution and greenhouse gas emissions.
| 4. What factors influence the rate of biological nitrogen fixation? | |
Ans. Several factors can influence the rate of biological nitrogen fixation. The availability of energy sources, such as carbohydrates, is essential for nitrogen-fixing microorganisms to carry out this process. Adequate levels of other essential nutrients, such as phosphorus and molybdenum, are also required. Environmental conditions, such as temperature, pH, and oxygen levels, can affect the activity and efficiency of nitrogen-fixing organisms.
| 5. Are there any limitations or challenges associated with biological nitrogen fixation? | |
Ans. While biological nitrogen fixation is highly beneficial, it also has limitations and challenges. Some plants, such as cereal crops like rice and wheat, do not have the ability to form symbiotic relationships with nitrogen-fixing bacteria, limiting their access to fixed nitrogen. Additionally, the efficiency of nitrogen fixation can be influenced by environmental factors, making it less reliable in certain conditions. Ongoing research focuses on improving nitrogen fixation efficiency and expanding its applicability to a wider range of crops.
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Nov 22, 2024 Last updated |
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