These organs evolved eight times, at least, because they occur on different body parts and have structural differences.

The central structural difference between the two is in health insurance.

He had yet to show a single quality of structural difference between himself and other human beings.

In 1960 there were not big structural differences between rich and poor families.

He argued that there were distinct structural differences between the economic policies of the two countries.

However, there are significant structural differences between both Vps26 and arrestins.

This section will review the drug development from one generation to the next with emphasis on the structural differences between the generations.

There are also important internal structural differences between stems and roots.

This structural difference may be responsible for variations in behavior between the sexes.

There appear to be structural differences between the major countries in the pattern of industrial financing.