“...life, with its several powers, having been originally breathed into a few forms or into one...”
Quite a “scientific theory”.
Today's scientific instruments tell us, according to page 284 of Steve Jones "Darwin's Ghost" that ...
About a thousand genes are shared by every organism, however simple or complicated. Although their common ancestor must have lived more than a billion years ago, their shared structure can still be glimpsed. It shows how the grand plan of life has been modified through the course of evolution."