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

[Q]: Comparing genome sequences provides clues to evolution and development.
[A]: Comparing what sequences provides clues to evolution and development?


[Q]: The mesopause is at the top of the mesosphere.
[A]: What is at the top of the mesosphere?


[Q]: The intermolecular structure of ice has spaces that are not present in liquid water.
[A]:
The intermolecular structure of what has spaces that are not present in liquid water?