Plesiadapiforms had several primitive features, including
A) nails instead of claws.
B) eyes that were placed on the sides of their heads.
C) the presence of a postorbital bar.
D) habitual terrestrial behavior.

Question

Quizplus · Accepted Answer

Plesiadapiforms, considered early relatives of modern primates, had eyes placed on the sides of their heads, a feature indicative of a more primitive visual system compared to the forward-facing eyes associated with the depth perception of later primates. This trait suggests they were adapted to a different ecological niche or mode of life, possibly emphasizing a reliance on olfactory and auditory senses over visual depth perception for navigating their environment.

Plesiadapiforms Had Several Primitive Features, Including