Each clan has different physiological and cultural differences based upon where in the world were they are located.

The physiological difference between aliens and ourselves matters to us?

The physiological differences between men and women go beyond reproductive systems.

But some male-female physiological differences may be significant in this area.

The physiological difference that most fundamentally limits women's performance is strength.

So, this makes me wonder quite a bit about the physiological differences between birds and mammals.

However, it has acquired significant physiological differences from the brown bear.

Despite the physiological differences, Kirk had no trouble reading his expression.

But the court ruled that the company had used separate weight standards "based on real physiological differences."

There is no known physiological difference between these two cell types.