Yes. Most farms will use the soft shelled eggs for themselves as they do not keep well and the lack of calcium in the shell makes them hard to store. There is nothing wrong with the "rubber" egg except the hen can no longer process the calcium she ate for use in the making of an egg, or is not receiving enough calcium in her diet. It's a good idea to feed hens the shells from their eggs, dry and crushed, as a calcium supplement.
Platypus eggs are soft and leathery, rather than hard-shelled.
Reptile eggs are soft-shelled - as opposed to the calcified shell of a birds egg.
It has a soft tush ;)
Yes.Platypuses, along with echidnas, are the only known egg-laying mammals, or monotremes. They lay soft-shelled, leathery eggs.
Turtle eggs (and tortoise eggs) can be either hard or soft-shelled, depending on the species.
The primary function - is to contain the developing embryo and its nutritional yolk-sac until the foetus is ready to emerge. That applies whether it's a hard-shelled egg like a bird, or a soft-shell like a reptile.
Reptile eggs are soft-shelled so that the babies can break out of the shells. Bird eggs are hard-shelled, because baby birds use their beaks to crack the shells of their eggs, but since reptiles don't have beaks to use to break their shells, their eggs have to be soft-shelled.
Eat it !
yup
You cook it up and eat it.
chicken
yes