What are our 5 levels of organization from smallest to largest ?

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

The fascicles of the deltoid are ; the fascicles of the pectoralis parallel; bipennate fusiform; unipennate multipennate; triangular bipennate; fusiform

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity