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

A desmosome is a cell structure that anchors the ends of cardiac muscle fibers together.
A desmosome is a cell structure that anchors the ends of what fibers together?

In pupa stage of their life cycle do insects begin developing their wings.
In what stage of their life cycle do insects begin developing their wings?

Unlike a crystalline solid, an amorphous solid is a solid that lacks a ordered internal structure.

Unlike a crystalline solid, an amorphous solid is a solid that lacks a what?