In this section each item consists of six sentences of a passage. The first and the sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled as P, Q, R and S. You are required to find out the proper sequence of the four sentences and mark your response accordingly on Answer Sheet. S1 : Biology is the study of life in its entirety. S6 : Classical descriptive and clueless biology found a theoretical framework in the evolutionary theory of Darwin. P : In later years, the focus was physiology and internal morphology or anatomy. Q : Darwinian ideas of evolution by natural selection changed the perception completely. R : The growth of biology as a natural science during the last 1000 years is interesting from many points of view. S : One feature of this growth is changing emphasis from mere description of life forms to identification and classification of all recorded living forms. The correct sequence should be