Question

describe the nitrogen cycle support your answer with the diagram

Answer 1

The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among the atmosphere, terrestrial, and marineecosystems. The conversion of nitrogen can be carried out through both biological and physical processes. Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification. The majority of Earth's atmosphere (78%) is nitrogen, making it the largest source of nitrogen. However, atmospheric nitrogen has limited availability for biological use, leading to a scarcity of usable nitrogen in many types of ecosystems. The nitrogen cycle is of particular interest to ecologists because nitrogen availability can affect the rate of key ecosystem processes, including primary production and decomposition. Human activities such as fossil fuel combustion, use of artificial nitrogen fertilizers, and release of nitrogen in wastewater have dramatically altered the global nitrogen cycle.

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Answer 2

Answer:

Nitrogen is essential nutrient for the survival of living being is found in protein like DNA and RNA. Nitrogen cannot be used directly from the atmosphere and have to be converted into nitrates and nitrites by certain nitrogen fixing bacteria. These bacteria are found in root noodles of leguminous, plant that give us pulses.

Another method through which the nitrogen in our environment can be converted into nitrates or nitrites is physical process of lightning the high pressure and temperature during the lightning create the nitrogen into oxide and nitrogen into oxide of nitrogen then dissolve in water bodies, thus forming nitrous and nitric acid.

Once nitrogen is converted to the useful form of nitrates and nitrites they can be used for the plant for use them to produce amino acids, which are then used to make protein other Complex compounds that requires nitrogen are also made of these through some Complex bio chemical process. These proteins by animal once these plants and animal die and and ded buried in the soil bacteria convert this protein back to nitrites and nitrates. The certain kind of bacteria converts protein to elemental nitrogen. Thus completing a complete nitrogen cycle.

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