Today's adults are taller and heavier than those of a century ago.The differences between these generational groups are best attributed to differences in

Question

Quizplus · Accepted Answer

The increase in height and weight can be attributed to improvements in nutrition over the past century, rather than genetic changes, as these changes occur over too short a time period for genetic evolution to have a significant impact. Temperament and epigenetic molecules are not directly related to physical size and weight.

Today's Adults Are Taller and Heavier Than Those of a Century