question_answer

A study on the effects of industrialization On the (arbitrary unit) populations of four species of   fish, P, Q, R and S in a river was conducted over a period of ten years. The given graph shows       the changes in their population over the years. In 1966, a nuclear power station was built nearby     and hot water from its cooling First discharge        Second discharge reactor was discharged into the River. In 1971, a metal fabrication factory was built nearby which discharged waste chemicals into the river. Which of the following statements is incorrect regarding this study?

A)  The population of P and Q decreased, while population of R and S increased.

B)  P and Q adapted to warmer waters, face increasing competition tor 'roo6 from R and S.

C)  R and S got adapted to warmer waters, face lesser competition from P and Q.

D)  All the four species (P, Q, R and S) were unable to adapt to the chemical wastes.