Q. How animals get the nitrogen they need

Q. Organisms that need nitrogen to survive

Q. Organisms that play a role in the nitrogen cycle

Q. Bacteria fix nitrogen on plant roots. Plant roots provide sugar to bacteria. This is an example of

Q. All plants have nitrogen fixing nodules on their roots.

Q. Nitrogen rich fertilizers and manure can cause water pollution.

Q. How nitrogen is "fixed" into useable form for plants

Q. Organism that breaks down dead plants & animals and releases nitrogen back into atmosphere

Q. How plants get the nitrogen they need

Q. Gas that makes up almost 80% of Earth's atmosphere