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

Example Input: Transpiration is when plant roots absorb liquid water and release water vapor into the atmosphere.
Example Output: What is it called when plant roots absorb liquid water and release water vapor into the atmosphere?

Example Input: Destructive interference in waves occurs two troughs what things overlap.
Example Output: Destructive interference in waves occurs when what things overlap?

Example Input: The lungs of mammals are unique in having alveoli.
Example Output:
The lungs of mammals are unique in having what?