Vocabulary for Life of Primates

Vocabulary for Life of Primates - Vocabulary for Life of...

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Vocabulary for Life of Primates Natural selection: variation among individuals in a species o Individual compete for resources o Advantageous traits improve an individual chance of survival o Traits are inherited o With greater reproductive success, advantageous traits become more common o Over a large span of time, traits may change so much that new species originate o Geographic isolation may help this occur Fitness: how many offspring an individual has that survive to reproduce o LRS: how many surviving offspring an individual has Homology: similar traits between species o i.e. vertebrate / forelimbs o behavioral homology exists: primates / social groups Shared Primitive, symplesiomorphic trait: a trait shared between two or more taxa, but which is also shared with other taxa which have an earlier common ancestor Shared derived, synapomorphic trait: a trait shared by two or more taxa and their most recent ancestor, whose ancestor in turn does not possess the trait Pendactyly: having 5 digits Prehensile tails: able to grasp, hold on to objects, branches o Makes climbing / living in trees easier Volar Pads: fleshy pads of skin with many nerve endings (makes hands sensitive) Binocular Vision: both eyes are used together, wider field of view, overlapping fields of vision o Allows us to see in “3D” in the centre field Stereoscopic Vision: visual perception leading to the perception of depth from the two slightly different projections of the world onto the retinas of the eyes o Sensory information from each eye
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Each eye sees a slightly different image Postorbital Bar: bony bar that encircles the eye socket o Gives more stability: protection to the eye Orthograde Posture: upright walking or sitting
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This note was uploaded on 08/15/2011 for the course ANTHRO 212 taught by Professor Staff during the Spring '11 term at Rutgers.

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Vocabulary for Life of Primates - Vocabulary for Life of...

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