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Questions and Answers
What is the main purpose of nitrogen fixation?
What is the main purpose of nitrogen fixation?
- To release excess nitrite into the environment
- To break down nitrate into ammonia
- To create organic molecules like amino acids (correct)
- To convert ammonia to nitrate
Which type of bacteria are a major source of nitrogen fixation in the oceans?
Which type of bacteria are a major source of nitrogen fixation in the oceans?
- Blue-green algae (cyanobacteria) (correct)
- Free-living soil bacteria
- Symbiotic bacteria
- Aerobic bacteria
What is the process called when ammonia is converted to nitrite and then to nitrate?
What is the process called when ammonia is converted to nitrite and then to nitrate?
- Nitrification (correct)
- Ammonification
- Denitrification
- Nitrogen fixation
In addition to producers, which organisms can directly use excess ammonia released by nitrogen-fixing bacteria?
In addition to producers, which organisms can directly use excess ammonia released by nitrogen-fixing bacteria?
What is the primary energy source for some aerobic bacteria during the nitrification process?
What is the primary energy source for some aerobic bacteria during the nitrification process?
What is the process by which denitrifying bacteria convert nitrate back into atmospheric nitrogen called?
What is the process by which denitrifying bacteria convert nitrate back into atmospheric nitrogen called?
In the nitrogen cycle, what is the form of nitrogen primarily used by plants?
In the nitrogen cycle, what is the form of nitrogen primarily used by plants?
What ecological process occurs when excess nutrients are added to a body of water?
What ecological process occurs when excess nutrients are added to a body of water?
Which of the following pollutants react with water in the atmosphere to create acid rain?
Which of the following pollutants react with water in the atmosphere to create acid rain?
What is the major reason coal is considered the dirtiest fossil fuel in terms of air pollution?
What is the major reason coal is considered the dirtiest fossil fuel in terms of air pollution?
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