Quiz on Nitrogen Cycle

What is the primary source of nitrogen in the Earth's atmosphere?

• Nitrogen oxides

• Nitrogen gas

• Ammonia

• Nitrate

Explain the process of nitrogen fixation and its significance in the nitrogen cycle.

Which process converts atmospheric nitrogen (N2) into a form that plants can use?

• Denitrification

• Nitrogen fixation

• Nitrification

• Assimilation

Nitrogen-fixing bacteria convert atmospheric nitrogen to _________.

What is the ultimate fate of nitrogen in the atmosphere after it is released during denitrification?