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

A frog develops (a/an) lungs as it changes from a tadpole to an adult frog.
Which of the following structures does a frog develop as it changes from a tadpole to an adult frog?

Seedless and seed are the two divisions of vascular plants.
What are the two divisions of vascular plants?

The capsule is the layer outside the cell wall in a prokaryote.
What is the layer outside the cell wall in a prokaryote?