1.   Prospective physical geographers should take basic courses in calculus, physics, chemistry, engineering, modern biology, and computer programming.

2.   Now in modern evolutionary biology, sex again is based on a scientific quantitative definition, not on a subjective human or qualitative one.

3.   As the unifying theme of modern biology research, evolution is considered no less of a theory than the theory of gravity.

4.   Ethics and modern biology, however, have rarely walked hand in hand, and stem-cell research has added new complexities to the relationship.

5.   Evolution, which explains how plant and animal species arise and why we have diversity among species, is the keystone of modern biology.

6.   For years, states have negotiated unsuccessfully to make the treaty more rigorous, the efforts thwarted mainly by disputes over how to police modern biology and medicine.

7.   I said in that column that evolution is the foundation of modern biology.

8.   In April, the president explored ways in which modern biology might help.

9.   In the long run, the technique could also run up against the biggest taboo in modern biology.

10.   It was the study of these relatively simple biological processes that laid the basis for much of modern biology.