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

[EX Q]: Embryos usually don't survive if they have extra or too few of these genetic units?
[EX A]: Embryos usually don't survive if they have extra or too few of these genetic units?

[EX Q]: Vesicles are basic tools of the cell for organizing metabolism, transport, and storage of molecules.
[EX A]: What are basic tools of the cell for organizing metabolism, transport, and storage of molecules?

[EX Q]: Cell term is used to describe a collection of molecules surrounded by a phospholipid bilayer that is capable of reproducing itself.
[EX A]:
What term is used to describe a collection of molecules surrounded by a phospholipid bilayer that is capable of reproducing itself?