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

[EX Q]: The name for a matter that has a fixed volume and a fixed shape is solid.
[EX A]: What is the name for a matter that has a fixed volume and a fixed shape?

[EX Q]: Volvox sphere has a distinct front and back end.
[EX A]: What has a distinct front and back end?

[EX Q]: All of the petals together are called a corolla.
[EX A]:
All of the petals together are called what?