Question

characteristics shared by primates include:___________ a) flat nails instead of claws. b) grasping hands with opposable thumbs. c) binocular vision and excellent depth perception. d) large brain size in comparison to body size. e) all answers are correct.

Answer 1

Answer: Option E) All answers are correct

Explanation:

A good example of Primates is humans.

Primates, thus, have evolved from mammals to have the following:

- five digits with flat nails for grasping tools

- grasping hand with thumbs that are in an almost opposite location to help in grasping tools

- two eyes in the front of their head

- a well developed and large brain for high reasoning. Thus, humans are called Homo sapiens

Hence, all the answers are correct

Answer 2

Answer:

Option E, all answers are correct

Explanation:

Primates have adopted grasping hands to adapt to easy life on trees. They also have opposable thumbs as it helps them to hold the tree branches. Earlier they used to have claws but with the evolution of grasping hand, claws disappeared. Now they have flat fingernails which allows them to hold the smallest of the object. Their brain is unusually large (large cerebral hemisphere) as compared to their body and has evolved slowly. They also have binocular vision which allows them to see up to stereoscopic depth

Hence, option  is correct