11.   For a decade, scientists have been able to clone animals from very early embryo cells.

12.   For the last decade, scientists have cloned from early embryo cells, which are not yet specialized.

13.   He cloned from more developmentally advanced embryo cells, those that had already begun to specialize.

14.   If you can grow a mouse from a single embryo cell, you should in theory be able to grow a human from a single human embryo cell.

15.   If it got into the monkey embryos and functioned, the embryo cells would glow green under a fluorescent light.

16.   It could just be that the embryo cells had DNA that was unusually conducive to cloning, many thought.

17.   Leading scientists note, however, that once they produce such an embryo cell, by cloning, that cell need not become a new human being.

18.   Later, mice, sheep and cattle were cloned from embryo cells.

19.   On the question of fetal tissue research, Bush said during the campaign that he opposed using federal money for research on fetal tissue or human embryo cells.

20.   Pediatricians need not worry about giving measles shots, usually prepared in chick embryo cells, to children who are allergic to eggs.