Question mark
In the early 13th century, when the growth of communities of scholars (universities) in Paris and other major cities led to an expansion and streamlining of the book-production trade, punctuation was rationalized by assigning Alcuin's stroke-over-dot specifically to interrogatives; by this time the stroke was more sharply curved and can easily be recognized as the modern question mark.
Quotation mark
Initially, the French guillemet characters were not angle shaped but also used the comma (6/9) shape. They were different from English quotes because they were standing (like today's guillemets) "on" the baseline (like lowercase letters), and not above it (like apostrophes and English quotation marks) or hanging down from it (like commas). At the beginning of the nineteenth century, this shape evolved to look like  small parentheses . The angle shape appeared later to increase the distinction and avoid confusions with apostrophes, commas and parentheses in handwritten manuscripts submitted to publishers. Unicode currently does not provide alternate codes for these 6/9 guillemets on the baseline, which are still considered as form variants implemented in older French typography (such as the Didot font design). Also there was not necessarily any distinction of shape between the opening and closing guillemets, with both types pointing to the right (like today's French closing guillemets).