Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

Ex Input:
Question: What substances dissociate into ions when dissolved in water? Answer: ionic

Ex Output:
Ionic substances dissociate into ions when they dissolve in water, but most molecular substances do not.

Ex Input:
Question: What do nonvascular plants reproduce with? Answer: spores

Ex Output:
Nonvascular plants are low-growing, reproduce with spores, and need a moist habitat.

Ex Input:
Question: A type of what in a cow's gut enables the animal to digest grass? Answer: bacteria

Ex Output:
Kevin Walsh. Cows are able to digest grass with the help of the bacteria methanogens in their gut . CC BY 2.0.