1. Plants are complex organisms that are composed of multiple layers of organization. Which of the following best represents the organization of the root system from
most complex to least complex?
O
root system - root- phloem - cell
root system - cell phloem- root
O
root system - phloem root -cell
O
root system - root
cell - phloem
CLEAR ALL

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.