(fill in the blank) prairiea and savanna's are two type of

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

ask your friends for what they got then copy it down if you don't have any friends which is fine than google it or pay the teacher

1. is geographic distribution

2 is increasing complexity

3 is transitional forms