Give proper term for each of the following:
(a) Smaller constituent operational unit of biosphere.
(b) Accumulation of non-biodegradable toxic substance in the increasing order in a food chain.
a. Ecosystem
It is structural and functional unit of biosphere comprising of both biotic and abiotic components.
b. Biomagnification
The phenomenon of increase in concentration of harmful chemicals mainly non-biodegradable toxic chemicals at every trophic level is called biomagnification.