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.

[Q]: Question: Average speed is equal to distance divided by what? Answer: time
[A]: Average speed is distance divided by time.

[Q]: Question: Puberty and other physical changes occurs during which stage of development? Answer: adolescence
[A]: Adolescence includes the physical changes of puberty among other changes.

[Q]: Question: Individuals with sickle cell anemia have crescent-shaped what? Answer: red blood cells
[A]:
Figure 39.21 Individuals with sickle cell anemia have crescent-shaped red blood cells. (credit: modification of work by Ed Uthman; scale-bar data from Matt Russell).