Nitrogen Cycle Flashcard

Front

What is the primary source of nitrogen for plants? Options: Nitrogen gas, Ammonium (NH4+), Nitrate (NO3-), Nitrogen oxides (NOx)

Back

Nitrate (NO3-)

Front

Which process converts atmospheric nitrogen (N2) into a form usable by plants? Options: Ammonification, Nitrification, Nitrogen fixation, Denitrification

Back

Nitrogen fixation

Front

Nitrogen-fixing bacteria in root nodules are often associated with which type of plants? Options: Grasses, Legumes, Trees, Ferns

Back

Legumes

Front

What is the process by which dead organisms and waste products are broken down, releasing ammonium?

Back

Ammonification

Front

Which process converts ammonium (NH4+) to nitrate (NO3-)?

Back

Nitrification

Front

What is the final step in the nitrogen cycle, returning nitrogen to the atmosphere?

Back

Denitrification

Front

Bacteria involved in converting nitrate to nitrogen gas in denitrification: Rhizobium, Nitrosomonas, Pseudomonas, Azotobacter

Back

Pseudomonas

Front

Which of the following compounds is least accessible to plants? Nitrate (NO3-), Ammonium (NH4+), Atmospheric nitrogen (N2), Nitrite (NO2-)

Back

Atmospheric nitrogen (N2)

Front

The Haber-Bosch process is primarily used for:

Back

Industrial nitrogen fixation

Front

Which type of organism is primarily responsible for nitrogen fixation in aquatic ecosystems? Fish, Algae, Cyanobacteria, Fungi

Back

Cyanobacteria