11.   Peterson, a biology major who has a coop job at Upstate Biotechnology in Waltham, thinks about pursuing a career in diet and nutrition after graduating next spring.

12.   Their discussion entered an area that is complex even for a biology major who will graduate this spring, on time, with distinction.

13.   Tosca Zern, a junior biology major from Shelton, Conn., frowned over her computer during a physiology laboratory.

14.   Haidar Saheb, a biology major at Al-Mustansariya University, says he works whenever he can, but is determined to have time for study.

15.   Jennifer Chow, a biology major from Voorhees, New Jersey, was repulsed by spiders when she signed up for the course last year.