Organisms found in the higher trophic level show greater accumulation of pesticides due to the phenomenon of biomagnification - which is defined as the gradual increase in concentration of harmful pesticides in the food chain, with increase in trophic level.

Correct Option: C

Organisms found in the higher trophic level show greater accumulation of pesticides due to the phenomenon of biomagnification - which is defined as the gradual increase in concentration of harmful pesticides in the food chain, with increase in trophic level.

Biological magnification is the increase in concentration of persistent pollutant per unit weight of the organism with the rise in trophic level.

Correct Option: A

Biological magnification is the increase in concentration of persistent pollutant per unit weight of the organism with the rise in trophic level.

DDT causes egg shell thinning in birds because it inhibits Calcium ATPase.

Correct Option: B

DDT causes egg shell thinning in birds because it inhibits Calcium ATPase.

Hydrilla is a fresh water plant.

Correct Option: A

Hydrilla is a fresh water plant.

E. coli grows in water polluted by sewage and domestic waste.

Correct Option: C

E. coli grows in water polluted by sewage and domestic waste.