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

Ex Input:
The vascular structure functions as a framework that reinforces the shape of the leaf.

Ex Output:
What functions as a framework that reinforces the shape of the leaf?


Ex Input:
Single-celled eukaryotes that share some traits with animals are also called?

Ex Output:
Single-celled eukaryotes that share some traits with animals are also called?


Ex Input:
The electrochemical potential across a membrane determines the tendency of an ion to do cross the membrane.

Ex Output:

The electrochemical potential across a membrane determines the tendency of an ion to do what?