Question

the friction ridges seen in finger, palm and foot prints are different among various people but very similar between identical twins. this evidence suggests which of the following?
that friction ridges are genetically determined.
that friction ridges allow for better tactile sensation.
that friction ridges aid in griping.
that friction ridges change over time.

Explanation:

Identical twins share the same genetic material. Since their friction ridges are very similar while those of different people are different, it implies a genetic basis. The other options (better tactile sensation, aiding in grip, changing over time) are not supported by the given evidence about similarity in identical twins.

Answer:

That friction ridges are genetically determined.