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| Active at night and at rest during the day |
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| Active during the day and at rest at night |
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| Vision with increased depth perception from two eyes set next to each other allowing their visual fields to overlap |
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| Complete 3D vision (or depth perception) from binocular vision and nerve connections that run from each eye to both sides of the brain allowing nerve cells to integrate the images derived from each eye |
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| Able to bring the thumb or big toe in contact with the tips of the other digits on the same hand or foot in order to grasp objects |
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| A subdivision within the primate order based on shared anatomical characteristics that includes lemurs, lorises, and tarsiers |
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| A subdivision within the primate order based on shared anatomical characteristics that includes New World monkeys, Old World monkeys, and apes (including humans) |
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| A subdivision within the primate order based on shared genetic characteristics; includes lemurs and lorises |
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| A subdivision within the primate order based on shared genetic characteristics; includes tarsiers, New World monkeys, Old World monkeys, and apes (including humans) |
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| Having the ability to grasp |
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| Using the arms to move from branch to branch, with the body hanging suspended beneath the arms |
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| A unit of primate social organization composed of 50 or more individuals who inhabit a large geographical area together |
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| An observed ranking system in the primate societies ordering individuals from high (alpha) to low standing corresponding to predictable behavior interactions including domination |
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| The ritual cleaning of another animal's skin and fur to remove parasites and other matter |
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| Moment when an egg released from the ovaries into the womb is receptive for fertilization |
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| An object used to facilitate some task or activity |
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