Characteristic seen in some New World monkeys, but not Old World monkeys. New world monkeys are almost exclusively arboreal, and some never come to the ground. Like the old world monkeys, all except one species are diurnal. Shape of the nose distinguishes a difference.
What are characteristics of Old World monkeys?Old World monkeys have a variety of facial features; some have snouts, some are flat nosed, and many exhibit coloration. Most have tails, but they are not prehensile.
What do New World monkeys look like?The noses of New World monkeys are flatter than the narrow noses of the Old World monkeys, and have side-facing nostrils. New World monkeys are the only monkeys with prehensile tails—in comparison with the shorter, non-grasping tails of the anthropoids of the Old World.
What two major groups are monkeys divided into?Primates are divided into two groups: prosimians and anthropoids. Monkeys evolved from prosimians during the Oligocene Epoch. Apes evolved from catarrhines in Africa during the Miocene Epoch. Apes are divided into the lesser apes and the greater apes.
Do monkeys have a high degree of interspecies variability?O Monkeys have a high degree of interspecies variability: apes have a low degree of variability.
Researchers recently found that humanity's last shared ancestor with great and — our closest primate relatives — had evolved the ability to detect relationships between groups of sounds, a foundational skill for understanding language, according to the new study.
Structurally, language is made up of sentences, and in a sentence, every word has meaning. But meaning also comes from grammar, or how the words are arranged. Being able to recognize and interpret relationships between phrases in a sentence is an important part of how our process language.
In human languages, groups of words in a sentence may be connected even when they're not right next to each other — a relationship known as nonadjacent dependency. Recognizing rules — — — Prior experiments had established that monkeys, which diverged from our last shared ancestor about 40 million years ago, could recognize these grammatical violations, the study authors reported.
Old World monkey
Chimps and humans diverged more recently, just 5 million to 6 million years ago. By testing chimps as well as humans and marmosets, a type of New World monkey, the scientists hoped to learn if this cognitive ability originated in a common ancestor — in which case it would be shared by all three primate groups — or if it appeared only in monkeys and humans because ofin which similar traits evolve independently in different species.
This suggests that the cognitive ability to process nonadjacent dependencies in language was in place at least 40 million years ago, when humans, apes and monkeys last shared a common ancestor and before language itself had evolved. However, a number of questions still remain, Watson said.
Building blocks of language evolved before humans split from chimps and monkeys
Perhaps in this aspect of language development, humans are unique among primates, he explained. The findings were published online Oct. Editor's Note: Updated at 10:11 a.
Originally published on Live Science. Her writing has also appeared in Scientific American, The Washington Post and How It Works Magazine.