instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Nonvascular plants are the only plants with a life cycle in which the gametophyte generation is dominant.
answer:
What are the only plants with a life cycle in which the gametophyte generation is dominant?


question:
Tornadoes can occur in any.
answer:
At what time of the year can tornadoes occur?


question:
Amines are classified according to the number of carbon atoms bonded directly to a(n) nitrogen atom.
answer:

Amines are classified according to the number of carbon atoms bonded directly to what atom?