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

[Q]: Competive exclusion princple explains why two different species cannot occupy the same niche in the same place for very long.
[A]: What explains why two different species cannot occupy the same niche in the same place for very long?


[Q]: Starches are complex carbohydrates that are the polymers of glucose.
[A]: What complex carbohydrates are the polymers of glucose?


[Q]: Half-life property of carbon and other elements can be used to date fossils and rocks, among other things.
[A]:
What property of carbon and other elements can be used to date fossils and rocks, among other things?