Which of the following statements about developing the conclusion of a scientific study is true? O No part of a scientific study can be considered to reach a conclusion,
O Reaching a conclusion in a scientific study means future study is no longer viable or necessary.
O Sociologists study very focused subjects in order to be able to answer all questions about it.
O The conclusion of a scientific study functions as both an end and a beginning.

the conclusion of a scientific study functions as both an end and beginning

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.