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 is the connecting piece of a sperm packed with? Answer: mitochondria
Example Output: The connecting piece of the sperm is packed with mitochondria. Mitochondria are organelles in cells that produce energy. Sperm use the energy to move.

Example Input: Question: The outer layer of what anatomical structure is so tough that it keeps out most pathogens? Answer: skin
Example Output: This drawing shows that the skin has many layers. The outer layer is so tough that it keeps out most pathogens.

Example Input: Question: An atomic symbol is used to represent what? Answer: element
Example Output:
Elements are represented by an atomic symbol.