What is the diferent between diffusion and facilitaed diffusion

Simple diffusion is passive but facilitated diffusion is an active process

In facilitated diffusion, molecules just move by the help of a protein in the membrane. Simple diffusion is passive while facilitated diffusion is an active process that utilizes energy. Simple diffusion needs molecules to move within special doorways in the cell membrane.

a community that experiences major changes undergoes progress

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.