Question

I-low many statements are correct. (a) in an aquatic ecosystem. grazing food chain is major conduits for energy flow (b) detritus food chain may be connected with grazing food chain at some icvcl (c) each tropic level has a certain mass of living materials at a particular time called as standing crop (d) species composition and stratification are iwo main structural features of an ecosystem (i) two (2) three (3) one (4) all

Answer 1

i think so option  2 or 4

Answer 2

Option =====>.. 2or 4