instruction:
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.
question:
Question: Individuals with sickle cell anemia have crescent-shaped what? Answer: red blood cells
answer:
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).

question:
Question: What is an ionic bond in nature? Answer: electrostatic
answer:
An ionic bond is electrostatic in nature.

question:
Question: What is the only metalloid in group 13? Answer: boron
answer:
Group 13 is called the boron group, and boron is the only metalloid in this group. The other group 13 elements are metals.