The presence of five digits on hands and feet is
A)a primitive mammalian pattern retained to some degree in most primate species.
B)characteristic only of primates.
C)characteristic only of apes and humans.
D)the only truly distinctive primate trait.
E)the result of diurnal activity.

Question

Quizplus · Accepted Answer

The presence of five digits on hands and feet is a primitive mammalian trait that has been retained in most primate species, reflecting an evolutionary lineage shared with other mammals.

The Presence of Five Digits on Hands and Feet Is