To get back on topic (this isn't quite the place to discuss the likelihood of original replicate molecules) creationism is decidedly a religion, while evolution is not.
COMPLETLY disregarding the validity of evolution, it still follows the scientific method, and is open to revision and falsification. Since it is also supported by evidence it is taught in science classes as what is probably true.
creationism on the other hand is not open to revision, and assumes pre-existing knowledge of the state of the world. well... they actually assume the existence and infallibility of a god, however that is even farther from the scientific method.
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