I'm ripping out all my drywall in my basement so that I can put up
insulation, run new wires, and then put on new drywall. After ripping the
drywall off with a crowbar I noticed that there were spiders amongus in the
framing which makes me wonder where they came from. I suspect they got in
between the sheathing and the framing studs as the plywood is discolored in
spots indicating weathering to me.

Can you reseal the connection between the plywood and the studs using
caulking or something similar or will that be an exercise in futility given
the rather large amounts of area to cover? Is it normal for there to be
gaps between that plywood and the studs and finding spiders in the walls no
big wonder?

Also, on a pleasant note. Originally my thought in tearing out the drywall
was so that I could inspect the sill plate as I noticed large gaps between
the sill plate and the foundation by the windows. After seeing the sill
plate behind the walls I notice that it is fairly embedded in the concrete
and painted with a grey substance I'm assuming is primer or weather sealant.
Which makes me wonder why the window area has such an uneven connection.