Question

You are a molecule of nitrogen. Choose a starting point in the nitrogen cycle and describe the process you would go through to move through the entire cycle.

Answer 1

Answer:Fixation - Fixation is the first step in the process of making nitrogen usable by plants. Here bacteria change nitrogen into ammonium.

Nitrification - This is the process by which ammonium gets changed into nitrates by bacteria. Nitrates are what the plants can then absorb.

Assimilation - This is how plants get nitrogen. They absorb nitrates from the soil into their roots. Then the nitrogen gets used in amino acids, nucleic acids, and chlorophyll.

Ammonification - This is part of the decaying process. When a plant or animal dies, decomposers like fungi and bacteria turn the nitrogen back into ammonium so it can reenter the nitrogen cycle.

Denitrification - Extra nitrogen in the soil gets put back out into the air. There are special bacteria that perform this task as well.

Explanation: these are all the steps and the test says i got it right.

Answer 2

Answer:

Nitrogen cycle: the movement of nitrogen in different forms through the natural world.

Explanation:

• The processes are categorized as nitrogen fixation, nitrogen assimilation, ammonification, nitrification, and denitrification, albeit they are not entirely sequential.
• Certain bacteria and blue-green algae are responsible for the majority (90 percent) of nitrogen fixation, which is the process by which nitrogen gas is transformed into inorganic nitrogen molecules. Abiotic methods fix a substantially lesser amount of free nitrogen (e.g., lightning, ultraviolet radiation, electrical equipment).
• Algae and higher plants incorporate nitrates and ammonia from nitrogen fixation into their own tissue components.
• Microorganisms degrade all living things' remnants and waste products during the ammonification process, producing ammonia (NH3) and ammonium (NH4+).
• Ammonia in the soil is converted by nitrifying bacteria into nitrates (NO3-), which plants can use as building blocks for their own tissues.
• Denitrifying bacteria, which are particularly active in waterlogged anaerobic soils, also break down nitrates. These bacteria tend to deplete soil nitrates, resulting in the formation of free atmospheric nitrogen.

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