In the past few decades,the average height of adults in Western countries has not changed much.This indicates that adult height for these countries has reached the upper boundary of their ____.

Question

Quizplus · Accepted Answer

Reaction range refers to the range of possible expressions of a genetic trait, and the environment plays a role in determining where within that range a trait actually falls. Adult height is largely determined by genetics, but it is also influenced by environmental factors such as nutrition and healthcare. The fact that height has not changed much in Western countries suggests that these environmental factors have not significantly altered the upper limit of the reaction range for this trait.

In the Past Few Decades,the Average Height of Adults in Western