Assuming you're talking about marking the shell in case it gets lost. The safest thing to do - would be to have the tortoise micro-chipped. That way, if it does get lost, it's simply a case of the finder taking the reptile to a vet - or calling animal control. Both of those organisations have scanners able to read the microchip - and will be able to contact the legitimate owner.
Yes Turtles do have an exoskeleton, it is called a shell. Without the shell the turtle would just be soft and in danger. :)
yes turtles do have a bottom shell
Why would you want to paint a turtle's shell anyway - unless it's for identification. A more sensible procedure would be micro-chipping ! It's permanent and doesn't wash off ! Anyway - to answer the question - so long as you use lead-free & solvent-free paint it shouldn't harm the turtle.
Yes Turtles do have an exoskeleton, it is called a shell. Without the shell the turtle would just be soft and in danger. :)
well you cant do that for them they half to do it on there own
no, nail polish has chemicals that can be fatal to it ,that would not be a good and safe idea.
Turtle cells. See "genetics". If you mean prior to turtles, it was a reptile without a shell, or just a tiny one.
Their shells appear to be painted, but it is accutually just the pigment in the shell that makes the paint like color.
A terrapin has a shell because it is a turtle, of course. There are 4kinds of turtles: aquatic turtles, land turtles, terrapins, and sea turtles. All turtles have shells.
Star Turtles are turtles with star like shell
A sea turtles shell stays on its back because its attached
A turtles shell is a form of armor; it makes it very hard for a predator to bite the turtle.