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16 Cards in this Set
- Front
- Back
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Ancestral trait
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A characteristic that is shared widely, such as mammary glands in mammals, and is considered to have been shared by a common ancestor.
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Arboreal
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Tree-dwelling.
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Binocular vision
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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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Brachiate
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To use the arms to move from branch to branch, with the body hanging suspended beneath the arms.
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Clavicle
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The collarbone.
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Cranium
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The brain case of the skull.
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Derived trait
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A characteristic shared narrowly among organisms that shows that organisms have a close evolutionary relationship.
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Estrus
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In primate females, the time of sexual receptivity during which ovulation takes place.
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Foramen magnum
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A large opening in the skull through which the spinal cord passes and connects to the brain.
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Home range
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The area within which a group of primates usually moves.
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Pentadactyly
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Possessing five digits (fingers and toes).
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Prehensile
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Having the ability to grasp.
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Scapula
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The shoulder blade.
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Sexual dimorphism
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Within a single species, the presence of marked anatomical differences between males and females.
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Stereoscopic vision
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Complete three-dimensional vision from binocular vision plus visual connections from each eye to both sides of the brain allowing nerve cells to integrate the images derived from each eye.
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Tool
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An object used to facilitate some task or activity. Although toolmaking involves intentional modification of the material of which it is made, tool use may involve objects either modified for some particular purpose or completely unmodified.
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