Studies have demonstrated that the intelligence (IQ)of adopted children is more similar to that of their biological parents than to that of the adoptive parents who raised them since infancy.What does this suggest?
A) Environment plays a particularly strong role in the development of IQ.
B) Heredity plays a particularly strong role in the development of IQ.
C) People who adopt children are not very smart.
D) Children who are adopted are not very smart.

Question

Quizplus · Accepted Answer

The fact that adopted children's IQ more closely resembles their biological parents than their adoptive parents suggests that heredity plays a stronger role in IQ development than environment. This does not imply anything about the intelligence of people who adopt children or the intelligence of adopted children.

Studies Have Demonstrated That the Intelligence (IQ)of Adopted Children Is