Question

Origin of primates occurred about ............. million years ago.

• A. 500 - 400
• B. 60 - 70
• C. 80 - 100
• D. 1.6 - 1.8

Answer 1

The correct option is B 60 - 70

A group of small, nocturnal and arboreal, insect-eating mammals called as the Euarchonta begins a speciation that will lead to the primate, treeshrew and flying lemur orders. The Primatomorpha is a subdivision of Euarchonta that includes the primates and the stem-primates Plesiadapiformes. One of the early stem-primates is Plesiadapis. Plesiadapis still had claws and the eyes located on each side of the head. Because of this they were faster on the ground than on the top of the trees, but they began to spend long times on lower branches of trees, feeding on fruits and leaves. The Plesiadapiformes very likely contain the species which is the ancestor of all primates. One of the last Plesiadapiformes is Carpolestes simpsoni. It had grasping digits but no forward-facing eyes. Origin of primates occured about 60 million years ago. Thus, the correct answer is option B.