Which of the following symptoms is characteristic of a manic mood state? a) Cycling between elation and depression
b) Catatonic excitement
c)
Disorganized speech in the form of a "word salad"
d) Extremely high self-esteem
)

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.

the answer would be   10%