Question

please answer the define's given in the attachment.​

Answer 1

Answer:

Biogeochemical cycle, any of the natural pathways by which essential elements of living matter are circulated. ... In order for the living components of a major ecosystem (e.g., a lake or a forest) to survive, all the chemical elements that make up living cells must be recycled continuously.

Nitrification is the biological oxidation of ammonia to nitrite followed by the oxidation of the nitrite to nitrate occurring through separate organisms or direct ammonia oxidation to nitrate in comammox bacteria. The transformation of ammonia to nitrite is usually the rate limiting step of nitrification.

Denitrification is the microbial process of reducing nitrate and nitrite to gaseous forms of nitrogen, principally nitrous oxide (N2O) and nitrogen (N2). ... Denitrification is a response to changes in the oxygen (O2) concentration of their immediate environment.

Explanation:

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Answer 2

Explanation:

1. Biogeochemical cycle- whenever some nutrients are transferred in living organism as well as in their non living environment i.e., is called as biogeochemical cycle.
2. Nitrification- nitrifying bacteria convert ammonia into nitrite then into nitrate because NH3 is highly toxic for some.
3. Denitrification- In this process is converted back into gaseous nitrogen( denitrifying bacteria use oxygen of nitrates in anaerobic condition)