Nitrogen Fixation Overview

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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?

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?

Nitrification (correct)

Ammonification

Denitrification

Nitrogen fixation

In addition to producers, which organisms can directly use excess ammonia released by nitrogen-fixing bacteria?

Consumers in the food chain Signup and view all the answers

What is the primary energy source for some aerobic bacteria during the nitrification process?

$\text{Ammonia}$ Signup and view all the answers

What is the process by which denitrifying bacteria convert nitrate back into atmospheric nitrogen called?

Denitrification Signup and view all the answers

In the nitrogen cycle, what is the form of nitrogen primarily used by plants?

Nitrate Signup and view all the answers

What ecological process occurs when excess nutrients are added to a body of water?

Eutrophication Signup and view all the answers

Which of the following pollutants react with water in the atmosphere to create acid rain?

Sulfur dioxide and nitrogen oxides Signup and view all the answers

What is the major reason coal is considered the dirtiest fossil fuel in terms of air pollution?

It releases high levels of sulfur dioxide and nitrogen oxides. Signup and view all the answers

Nitrogen Fixation Overview

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Questions and Answers

What is the main purpose of nitrogen fixation?

Which type of bacteria are a major source of nitrogen fixation in the oceans?

What is the process called when ammonia is converted to nitrite and then to nitrate?

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 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?

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?

What is the major reason coal is considered the dirtiest fossil fuel in terms of air pollution?

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