AP BIOLOGY

Detailed explanation-1: -NEW WORLD MONKEYS, OLD WORLD MONKEYS, APES AND HUMANS This trend is linked to an increasing reliance on vision and a decreasing reliance on smell. Monkeys and apes have dry noses; strepsirhines have wet noses.

Detailed explanation-2: -Old World Monkeys tend to be larger in overall size. They have fingernails that are flat instead of sharp. They also have nostrils that are narrow and point downward. The checks feature padding in them.

Detailed explanation-3: -New World monkeys are also flat-nosed (platyrrhine) with nostrils further apart, while Old World monkeys have nostrils closer together and a nose which faces down (catarrhine) (2). Another difference between these monkeys is the way they care for their young.

Detailed explanation-4: -Old World monkeys have noses that are lower on their face, and their nostrils are close together and either point down or to the front. New World monkey nostrils are far apart and point out to the side. Old World monkeys do not have prehensile tails, but the majority of them do have opposable thumbs.