Which two substances are well-known for biomagnification ?
A. Mercury and DDT
B. Cadmium and Lead
C. Petroleum hydrocarbons and sewage
D. Paper manufacturing effluents and copper
Answer:A
Which two substances are well-known for biomagnification ?
A. Mercury and DDT B. Cadmium and Lead C. Petroleum hydrocarbons and sewage D. Paper manufacturing effluents and copper