GMAT Critical Reasoning (CR) | Diseases have always plagued the earth’s living organisms. Scientists

Source: Nova GMAT

Diseases have always plagued the earth’s living organisms. Scientists believe that huge numbers of plant and animal diseases have developed and been eradicated naturally over time. This ongoing emergence and disappearance of diseases is ignored by those who blame the widespread incidence of cancer entirely upon man’s alteration of naturally occurring substances to, for instance, produce bigger and better food sources. For example, some claim that the use of hormones to increase