Spiders have an exoskeloton.
they shed every 20 years
i dont no
no they don't.
Yes
Yes they do. Scorpions and spiders shed their entire outer skin in one piece.
exoskeleton.
No they have no skeleton or exoskeloton
yes
Spiders shed their exoskeleton through a process called molting. They produce a new, soft exoskeleton under their old one, then they split open the old exoskeleton and crawl out of it. The new exoskeleton will harden and provide room for the spider to grow.
Since it's an invertebrate I should say yes.
Spiders have an exo skeleton, their "bones" are on the outside. No. they would not have a spine. although when some spiders molt, or shed their skin, and old exoskeleton. This enables them to grow.