instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
A desmosome is a cell structure that anchors the ends of cardiac muscle fibers together.
answer:
A desmosome is a cell structure that anchors the ends of what fibers together?

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:
Soil resource is considered nonrewable for human purposes, because it takes so long to form and is depleted by farming and other activities.
answer:
What resource is considered nonrewable for human purposes, because it takes so long to form and is depleted by farming and other activities?