Nitrogen Cycle - Daily Assessment Quiz

What is the role of nitrogen in plants?

• Provides energy

• Helps make proteins

• Absorbs water

• Supports respiration

Which bacteria fix nitrogen in leguminous plants?

• Lactobacillus

• E. coli

• Rhizobium

• Cyanobacteria

True or False: Plants can directly use atmospheric nitrogen.

• True

• False

What process converts dead matter into ammonia?

• Nitrification

• Denitrification

• Ammonification

• Photosynthesis

Which of the following returns nitrogen to the atmosphere?

• Nitrification

• Ammonification

• Denitrification

• Nitrogen fixation

What is nitrification?

• Conversion of nitrogen gas to proteins

• Conversion of ammonia to nitrites and nitrates

• Breakdown of proteins

• Use of nitrogen by animals

Fill in the blank: Nitrogen is returned to the atmosphere through (a)   .

Why is nitrogen fixation important?

• It recycles carbon

• It makes nitrogen available to plants

• It stores energy

• It removes waste

What would happen if decomposers were removed from the nitrogen cycle?

• Plants would grow faster

• Dead matter would not be broken down

• Nitrogen gas would increase

• More oxygen would be produced