Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

The amniotic egg first evolved in reptiles.
The amniotic egg first evolved in what species?

You call the separation of ions that occurs when a solid ionic compound dissolves dissociation.
What do you call the separation of ions that occurs when a solid ionic compound dissolves?

Chitin is the radula made mostly of.
What is the radula made mostly of?