Ascientist hypothesized that one species of dinosaur was the ancestor of a later species. she then found fossil evidence

Based on the description above, the reason why her  hypothesis cant become a scientific theory at this point because a  scientific theory explains a wide range of phenomena, and this does not.  hope this answer . 

This type of galaxy is an approximately ellipsoidal shape and a smooth, nearly featureless image. they are the largest single star systems, in the universe and are built by the collisions of many smaller galaxies.

North carolina ranks second in christmas tree production has nothing to do with biotechnology