AP BIOLOGY

CLASSIFICATION

CHARACTERISTICS OF PRIMATES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What characteristic distinguishes South American monkeys from African monkeys?
A
Long, prehensile tails
B
Binocular vision
C
Grasping fingers and toes
D
Opposable thumbs
Explanation: 

Detailed explanation-1: -It is thought that prehensile tails help animals move in tropical rainforest canopies, especially in those forests with large canopy gaps, fewer lianas and more fragile tree crowns.

Detailed explanation-2: -The Old World monkeys (including baboons) inhabit Africa and Asia, and are more closely related to apes. They are generally larger than New World monkeys, have more elongated faces, and have a tail that is not “prehensile".

Detailed explanation-3: -The only primate genera (Figure 1) that possess prehensile tails are spider monkeys (Ateles), woolly spider monkeys (Brachyteles), howler monkeys (Alouatta), woolly monkeys (Lagorix), and capuchin monkeys (Cebus)3.

Detailed explanation-4: -Old World monkeys have fingernails and toenails, while New World monkeys often have claws on all of their digits with the exception of the big toes of marmosets and tamarins (2, 3). Another exception is the spider and howler monkeys-New World species with nails like Old World monkeys (2).

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