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Nitrogen Cycle Video Lecture | Biology for JAMB
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FAQs on Nitrogen Cycle Video Lecture - Biology for JAMB
| 1. What is the nitrogen cycle? |  |
Ans. The nitrogen cycle is a biogeochemical process that describes the transformation and circulation of nitrogen in the environment. It involves various steps, including nitrogen fixation, nitrification, assimilation, ammonification, and denitrification.
| 2. How does nitrogen fixation occur in the nitrogen cycle? | |
Ans. Nitrogen fixation is the process by which atmospheric nitrogen gas (N2) is converted into a usable form, such as ammonium (NH4+), by certain bacteria. These bacteria, known as nitrogen-fixing bacteria, have the ability to break the strong triple bond between nitrogen atoms and convert it into a form that can be utilized by plants.
| 3. What is nitrification in the nitrogen cycle? | |
Ans. Nitrification is the process by which ammonia (NH3) is converted into nitrite (NO2-) and then further oxidized into nitrate (NO3-) by nitrifying bacteria. This conversion is important as it makes nitrogen available to plants in the form of nitrate, which they can absorb and utilize for their growth and development.
| 4. What is denitrification in the nitrogen cycle? | |
Ans. Denitrification is the process by which nitrate (NO3-) is converted back into atmospheric nitrogen gas (N2) by denitrifying bacteria. This process occurs in oxygen-deprived environments, such as waterlogged soils or sediments, and helps to remove excess nitrogen from the ecosystem.
| 5. How does the nitrogen cycle contribute to ecosystem balance? | |
Ans. The nitrogen cycle plays a crucial role in maintaining the balance of nitrogen in ecosystems. It ensures that nitrogen is available in a usable form for plants to grow, which in turn provides food for animals. Additionally, the nitrogen cycle helps to regulate the levels of nitrogen in the environment, preventing its accumulation to harmful levels and minimizing the negative impacts of excess nitrogen, such as eutrophication.
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Nov 15, 2024 Last updated |
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