This now stands--"The explanation is to a large extent simple, on the theory of the selection of successive, slight modifications.
If it could be demonstrated that any complex organ existed, which could not possibly have been formed by numerous, successive, slight modifications, my theory would absolutely break down.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "slight modifications" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.