if it is no longer moving or breathing, a sure fire way to check is to pick it up and try to open its mouth, if it resists, it's alive, but is probably very weak, also, some lizards, during the winter may go into bermation, which is basically hibernation but for lizards, if it's not winter, it's weak, you can help it by giving it reptivite, which you can get at most pet stores
one has a penis
well, how u can tell its jesus lizard is it has to have a beard.....yup
You Tell Me!
by feeling its belly
Dying to Tell You - 2010 was released on: USA: December 2010
By saying the words "I am dying".. After all we are all dying and each of us will die at some time.
it stops swimming
You can tell if you are dying at the age of nine if you start stuffing yourself with food or act as if you are one billion years old.
CNN Presents - 1993 Dying to Tell the Story was released on: USA: 2002
I think by looking at it's scales.
If it has a spot on its bottom it's a boy if not a girl
See the links below that will tell you all about it.