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

Ex Input:
The second step in eukaryotic cell division is division of nucleus part of the cell.

Ex Output:
The second step in eukaryotic cell division is division of which part of the cell?


Ex Input:
Water affects the availability of oxygen important element in aquatic environments and in flooded soils.

Ex Output:
Water affects the availability of what important element in aquatic environments and in flooded soils?


Ex Input:
An ion is an atom or group of bonded atoms that has a positive or negative charge.

Ex Output:

What is an atom or group of bonded atoms that has a positive or negative charge?