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

[EX Q]: Hydras and sea anemones are examples of apolyp.
[EX A]: Hydras and sea anemones are examples of what form?

[EX Q]: The vascular structure functions as a framework that reinforces the shape of the leaf.
[EX A]: What functions as a framework that reinforces the shape of the leaf?

[EX Q]: Most, if not all, of the extant animal phyla today evolved during the cambrian period, yet many of mass extinctions devastating events have taken place since then.
[EX A]:
Most, if not all, of the extant animal phyla today evolved during the cambrian period, yet many of what devastating events have taken place since then?