instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Living organisms are made up of biochemical type of carbon-based compounds.
answer:
Living organisms are made up of what type of carbon-based compounds?


question:
Competive exclusion princple explains why two different species cannot occupy the same niche in the same place for very long.
answer:
What explains why two different species cannot occupy the same niche in the same place for very long?


question:
Gabbro is a dark dense rock that can be found in the oceanic crust.
answer:
Gabbro is a dark dense rock that can be found in what?