Nitrogen returns to the atmosphere through a process called (1 point)
• denitrification.
• nitrogen cycle
• nitrification.
• nitrogen fixation
Nitrogen returns to the atmosphere through a process called:
• denitrification.
Nitrogen from animal waste can be stored in bodies of water as (1 point)
O nitrites.
O nitrates.
• nitrogen gas.
• ammonia.
Nitrogen from animal waste can be stored in bodies of water as:
• nitrates.
Living organisms can incorporate
into their metabolism. (1 point)
• nitrates
• nitrogen gas
• nitrites
• ammonia
Living organisms can incorporate:
• nitrates
• ammonia
Both nitrates and ammonia can be taken up and used by plants in their metabolism. These compounds can then enter the food web as animals consume the plants. Nitrites are also used by some organisms but are more often a transitional form in the nitrogen cycle, and not as commonly used for metabolic processes as nitrates and ammonia. Nitrogen gas (N2), which makes up about 78% of the Earth's atmosphere, is not directly usable by most living organisms until it is converted into forms like nitrates or ammonia through processes like nitrogen fixation.
The correct answer is denitrification.
To arrive at this answer, we need to have some knowledge about the nitrogen cycle. The nitrogen cycle is the process through which nitrogen is converted between its different forms in the environment. It includes processes such as nitrogen fixation, nitrification, denitrification, and others.
Nitrogen fixation is the process in which atmospheric nitrogen (N2) is converted into a usable form by certain bacteria. These bacteria convert nitrogen gas into ammonia (NH3) or nitrate (NO3-), which can then be taken up by plants.
Nitrification is the process by which ammonia is converted into nitrite (NO2-) and then into nitrate. This conversion is carried out by specific bacteria in the soil known as nitrifying bacteria.
Denitrification, on the other hand, is the process where nitrate is converted back into atmospheric nitrogen. This occurs when bacteria convert nitrate into nitrogen gas (N2), releasing it back into the atmosphere.
So, while nitrogen fixation and nitrification are processes that contribute to the nitrogen cycle, it is denitrification that allows nitrogen to return to the atmosphere. Therefore, the correct answer is denitrification.
Living organisms can incorporate______ into their metabolism.
A. Ammonia
B. Nitrites
C. Nitrates
D. Nitrogen gas