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

[Q]: Simple kind of diffusion do small hydrophobic molecules squeeze through lipid molecules.
[A]: What kind of diffusion do small hydrophobic molecules squeeze through lipid molecules?


[Q]: Single-celled eukaryotes that share some traits with animals are also called?
[A]: Single-celled eukaryotes that share some traits with animals are also called?


[Q]: Carbon dioxide molecules consist of a central carbon atom bonded to two oxygen atoms.
[A]:
Carbon dioxide molecules consist of a central carbon atom bonded to how many oxygen atoms?