Question on: SS2 Biology - Nutrient Cycling In Nature

The nitrogen cycle involves the conversion of nitrogen into different forms that can be utilized by living organisms. Nitrogen gas in the atmosphere is converted into ammonia through a process called nitrogen fixation. This can be done by nitrogen-fixing bacteria or through human activities like industrial processes or the use of fertilizers. Ammonia is then further converted into nitrites and nitrates through nitrification, which can be taken up by plants. Animals obtain nitrogen by consuming plants or other animals. Nitrogen is returned to the atmosphere through denitrification, where certain bacteria convert nitrates back into nitrogen gas.

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