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 is a layer of saturated porous rock? Answer: an aquifer

Ex Output:
An aquifer is a layer of saturated porous rock. It lies below the water table. An impermeable layer, such as clay, is below the aquifer.

Ex Input:
Question: During what type of reproduction do two haploid gametes join in the process of fertilization to produce a diploid zygote? Answer: sexual reproduction

Ex Output:
During sexual reproduction, two haploid gametes join in the process of fertilization to produce a diploid zygote.

Ex Input:
Question: What quality of sound makes a tuba and a piccolo very different to a listener? Answer: pitch

Ex Output:
A piccolo and a tuba sound very different. One difference is the pitch of their sounds.