ANT101H5 Lecture Notes - Old World Monkey, Grooming Claw, Foramen Magnum
13 Apr 2014
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Lecture 5 primates: our contemporary relatives & the basics of. The study of non-human primate biology & behavior. Similar in function but differs in embryonic development; does not represent an evolutionary relationship. Do not pass through similar stages during embryonic development: organisms do not share a common ancestor. Structures possessed by two different organisms that arise in a similar fashion. Important because it represents a common evolutionary relationship. Pass through similar stages during embryonic development: organisms that share a common ancestor, may serve different functions. High vaulted cranium (need space for our large brains) Forward shifted foramen magnum (round head for spine and upright posture) Reduced snout (don"t require highly sensitive sense of smell anymore) Brachiation rotate arm without collapsing shoulder (acts as a strut) Prehensibility opposable thumbs: reproduction & care of young. Reduction in the number of offspring born at one time to a female (usually one) Longer period of infant dependency on the mother.
