What process is aided by lightning legumes and soul bacteria

"Key players in this process are legumes and the symbiotic bacteria which are associated with the legume's root nodules. Thesebacteria are known as nitrogen-fixingbacteria. These organisms convert nitrogen in the soil to ammonia, which can then be taken up by plants."

source :https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.cas.miamioh.edu/mbi-ws/biogeochemicalcycles/Nitrogen/nitrogen.htm&ved=2ahUKEwij4MbP7&usg=AOvVaw1NLaMkgl0OB4rDyi07baWD&cshid=1550478305317

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

the answer is barium and copper bromide