Flows of energy and cycles of nutrients link the biotic and abiotic components of ecosystems into a/an system, ultimately structuring the feeding relationships, or structure of organisms that inhabit them.

You are working in the lab and are working with the same element but with varying isotopes of the element. you are working with c-11, c-13, c-14, and c-15. what is the average atomic mass of this element? (use periodic table) a- 12 b-15 c-14 d-13