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.

Example Input: Question: What hydrocarbons contain only single bonds between carbon atoms? Answer: saturated hydrocarbons
Example Output: Saturated hydrocarbons are hydrocarbons that contain only single bonds between carbon atoms. As a result, each carbon atom is bonded to as many hydrogen atoms as possible.

Example Input: Question: The metacarpophalangeal joints in the finger are examples of what kind of joints? Answer: condyloid
Example Output: Figure 38.30 The metacarpophalangeal joints in the finger are examples of condyloid joints. (credit: modification of work by Gray's Anatomy).

Example Input: Question: If a fixed amount of gas maintains a perfectly inversely proportional relationship between volume and pressure, then what else must be constant about the gas? Answer: temperature
Example Output:
For a fixed amount of gas at constant temperature, the volume is inversely proportional to its pressure.