{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

DSST Anthropology as a Discipline

They are nocturnal most active at night and are

Info iconThis preview shows pages 6–8. Sign up to view the full content.

View Full Document Right Arrow Icon
They are nocturnal (most active at night) and are characterized by "dental combs". Anthropoids have generally larger brains, binocular vision, increased parental care, and increased gestation and maturation. They can be classified into two groups: New world monkeys and Old world monkeys. Baboons are old world monkeys who are terrestrial in locomotion (they stay on the ground) and carnivorous (meat-eaters). They possess "harems" and exhibit high sexual dimorphism. Sexual dimorphism is the differentiation of males from females in size and appearance. Gibbons exhibit monogamy and therefore strong pair bonding. The social unit consists of a male, female, offspring and sometimes elder parents.
Background image of page 6

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Monogamy is the practice of having a single sexual partner during a period of time. Sexual dimorphism is low because males and females cooperate in territorial defense . Among orangutans, females associate with their infants while males are solitary. Males are solitary, but attempt to maintain a territory that includes several females. Male-male competition probably explains the high size sexual dimorphism in orangutans. All primates exhibit pentadactyly (they have five fingers), a generalized dental pattern, and a primitive (unspecialized) body plan. Another distinguishing feature of primates is fingernails. Opposing thumbs are also a defining primates feature, but are not limited to this order; opossums, for example, also have opposing thumbs. The anatomical and behavioral features that distinguish primates from members of other mammalian orders include a lack of strong specialization in structure; prehensile hands and feet, usually with opposable thumbs and great toes; flattened nails instead of claws on the digits; acute vision with some degree of binocular vision; relatively large brain exhibiting a degree of cortical folding; and prolonged postnatal dependency (longer dependence on the parents after birth). No primate exhibits all these features, and indeed the diversity of primate forms has produced disagreement as to their proper classification. The smallest primates are weighed in tens of grams, while the Gorilla typically weighs 140 to 180 kilograms (300 to 400 pounds). Nonhuman primates are found throughout the tropical areas of India, Africa, Asia, and South America. A few species also live in temperate latitudes, but lack of winter food supply limits their adaptability to these climates. Most primates have binocular vision and forward-facing eyes, two characteristics that are necessary for depth perception. Although their vision is highly developed, primates have shortened muzzles and a correspondingly reduced sense of smell. Except for two species, all primates have five digits on each hand and foot. All have prehensile (grasping ) hands, and all except man have prehensile feet.
Background image of page 7
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}