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encephalization
the proportional size of the brain relative to some other measure, usually an estimate of overall body size, such as weight
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allometry
also called scaling; the differential proportion among various anatomical structures
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cortex
layer. in the brain, the cortex is the layer that covers the cerebral hemispheres, which in turn cover more primitive or older structures related to bodily functions and the sense of smell
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neocortex
the more recently evolved portions of the cortex of the brain that are involved with higher mental functions and composed of areas that integrate incoming information from different sensory organs
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lateralized
localized to one side of the brain
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motor cortex
the areas of the brain's cortex involved with movement
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conspecifics
members of the same species
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anvils
surfaces on which an object such as a palm nut, root, or seed is placed before being struck with another object such as a stone
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anthropocentric
viewing nonhuman organisms in terms of human experience and capabilities; emphasizing the importance of humans over everything else
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core area
the portion of a home range containing the highest concentration and most reliable supplies of food and water
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territory
the portions of an individual's or group's home range actively defended against intrusion, particularly by conspecifics
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altruism
behavior that benefits another individual at some potential risk or cost to oneself
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