SCIENCE
ECOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the water cycle
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the carbon cycle
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the nitrogen cycle
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the hydrogen cycle
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Detailed explanation-1: -Some species of nitrogen-fixing bacteria are free-living in soil or water, while others are beneficial symbionts that live inside of plants.
Detailed explanation-2: -Biologically: Nitrogen gas (N2) diffuses into the soil from the atmosphere, and species of bacteria convert this nitrogen to ammonium ions (NH4+), which can be used by plants.
Detailed explanation-3: -The most important part of the cycle is bacteria. Bacteria help the nitrogen change between states so it can be used. When nitrogen is absorbed by the soil, different bacteria help it to change states so it can be absorbed by plants. Animals then get their nitrogen from the plants.
Detailed explanation-4: -The bacteria which help in nitrogen fixation are Azotobactor and Rhizobium. Some bacteria help to convert ammonia into nitrates. These are Nitrosomonas and Nitrobactor.
Detailed explanation-5: -Nitrogen is converted from atmospheric nitrogen (N2) into usable forms, such as NO2-, in a process known as fixation. The majority of nitrogen is fixed by bacteria, most of which are symbiotic with plants.