Nitrogen Cycle Bioman Video

What is the main reason the nitrogen cycle is important for life on Earth?

• It provides energy to plants

• It recycles water

• Nitrogen is needed to make DNA and proteins

• It helps in photosynthesis

Where are nitrogen-fixing bacteria typically found?

• In oceans

• In soil and root nodules of legumes

• In the atmosphere

• In animal intestines

What is nitrogen fixation?

• The process of converting nitrates to nitrogen gas

• The process of breaking nitrogen gas into ammonia

• The process of ammonia being taken up by plants

• The process of decomposing dead organisms

What do nitrifying bacteria do?

• Convert nitrogen gas into ammonia

• Convert ammonia into nitrates

• Decompose dead organisms

• Fix nitrogen from the soil

What happens to nitrogen when animals eat plants?

• It is released into the atmosphere

• It is absorbed into the soil

• It moves to the animal and is used to build biomolecules

• It becomes unusable

What is ammonification?

• The process of nitrogen gas being converted into nitrates

• The process of nitrogen moving through food webs

• The process of decomposing organisms returning nitrogen to the soil as ammonia

• The process of plants assimilating ammonia

What is denitrification?

• The process of converting nitrates back into nitrogen gas

• The process of breaking down ammonia into nitrites

• The process of nitrogen fixation

• The process of nitrogen moving through organisms

Which environment is best for denitrification to occur?

• Dry and sandy soils

• Rocky environments

• Waterlogged soils

• Urban areas