11.   Another is of women always taking the more subservient roles in home and work situations.

12.   Antibiotics play an essential role in controlling infection.

13.   As on land, local topography plays an important role in affecting the distribution of organisms.

14.   As one might suspect for addicted musicians, music plays a very small role in their lives.

15.   Basil Rocke played a highly significant role in the beginning of this transformation of the ethos of the classroom.

16.   Biology played an important role in southern exploration, for many of the early explorers were sealers and whalers.

17.   Biotechnology will surely play a vital role in any future chemicals industry.