11.  There is no biological reason to expect it to cause cancer, she said.

12.  They say there is no biological reason to discourage cousins from marrying.

13.  But they say there are strong biological reasons to think megadoses could be bad.

14.  Doctors said they cannot prove the vitamin is harmful during cancer treatment, but added that there are strong biological reasons to think megadoses could be bad.

15.  Hernandez also cited a cyclical downturn in coffee production due to biological reasons.

16.  The genetic study suggests a biological reason for this difference, Shriver said.