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

Q: Phospholipids are the main component of the cell membrane.

A: What is the main makeup of the cell membrane?
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Q: Modern members of the reptiles group live in many different habitats and are found on every continent except antarctica.

A: Modern members of what broad animal group live in many different habitats and are found on every continent except antarctica?
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Q: Soil resource is considered nonrewable for human purposes, because it takes so long to form and is depleted by farming and other activities.

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