Which of the following best explains why the environment plays a role in obesity?
a. The gene pool has remained relatively unchanged, but obesity rates have been rising.
b. Studies show that identical twins raised separately have body weights similar to their biological parents.
c. Body composition methods show that adipose storage sites are based on gender.
d. Uncoupling proteins explain variations in energy metabolism between lean and overweight people.
e. Food and activity behaviors influence genes.
Answer: A
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