He understood that such variation, through time, will lead to the development of what we call new species.

Both of these studies show that variation does not lead inevitably to change.

Variations in question wording or the order of questions, for example, can lead to somewhat different results.

Variation in the wording and order of questions, for example, may lead to somewhat different results.

Also variations in question wording or the order of questions can lead to somewhat different results.

The local variations in economic activities have led to craft specialization.

Variation in economic policy, on the other hand, can lead eventually to real convergence between economies.

Collectively, over five or six generations these small variations led to considerable population growth.

Given sufficient time, these variations may lead to reproductive isolation.

This variation can lead to a quick mating trap with 5.