During the past two decades, over 25% of the beluga whales in Canada's St. Lawrence Seaway have died of cancer. Biologists speculate that these deaths are caused by polycyclic aromatic hydrocarbon pollutants. These cause
A. oxidation of G to form an A
B. methylation of C to form a T
C. double strand breaks
D. pyrimidine dimers
E. G to T transversion mutations
these mechanisms may play a fundamental role in precipitating the development of a large and diverse number cancers in whales due tho the polyclic aromatic hydrocarbon pollution.
