mark-sexp - C-M-@ 
mark-defn - C-M-h
mark-paragraph - M-h
mark-page - C-x C-p

They don't seem very consistent to me. I also find it weird that the very useful mark-sexp has a pretty uncomfortable default keybinding.

On Wed, Jul 21, 2021, at 3:28 PM, Eli Zaretskii wrote:
> > Date: Wed, 21 Jul 2021 14:16:54 +0300
> > From: "Bozhidar Batsov" <bozhidar@batsov.com>
> > 
> > The mark-* keybindings are all over the place and they are hardly consistent (e.g. check out the bindings for
> > sexp, defun and paragraph)
> 
> Are they really inconsistent?  Could you elaborate?
>