But what proportion is there between the structural alteration and the functional result?

What may be the functional importance of either of these structures we know not.

Hence the functional basis is preferred in all cases in which it can be applied.

In biology it is more akin to the formal than to the functional attitude.

(b) Add limits of functional parts: handle, spout, cover, etc.

What is the value of accenting the functional parts in clay design?

It is not impossible that this is the vestige of a once functional eye.

No functional disturbance, and no lesion in regard to the eyes.

The feet frequently have five functional digits, and may be plantigrade.

These glands are present in both sexes, but are functional only in the female.