PDF chapter test TRY NOW

Read these sentences and choose the answer:
  
1. Nitrogen fixing bacteria convert nitrogen in the    into nitrites and nitrates.
 
2. In leguminous plants, absorption of nitrogen is facilitated by   bacteria.
 
3. The process of removing pollutants from a highly polluted environment, such as municipal water tanks, sewage water, or oil spills in water, is known as bioremediation  .