1.  But there are also biological reasons for its persistence.

2.  Although Wilmut said he saw no intrinsic biological reason why humans, too, could not be cloned, he dismissed the idea as being ethically unacceptable.

3.  But Halperin notes there are also biological reasons that suggest the foreskin is particularly vulnerable to HIV.

4.  I found biological reasons, ecological reasons, homeowner reasons ... other positive reasons as to why planting would work, why it would be good.

5.  One type, animal studies, can hint at the biological reasons some substances are potential health hazards.

6.  The company argued that there was no biological reason why orlistat would cause breast cancer, but the FDA asked for a detailed analysis of the question.

7.  The limited liberating ethic of Darwinism is based on biological reason.

8.  There are no known biological reasons why minorities might have different cancer rates from whites, which leaves experts looking to socioeconomic and behavioral explanations.

9.  There may be biological reasons for their mass, too.

10.  There even was a biological reason.