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Human Evolution Definitions
Year 13 Biology definitions flash cards Human Evolution
98
Biology
12th Grade
10/11/2012

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Term
ÒMulti-regionalÓ hypothesis
Definition
The view that modern humans evolved independently in Africa, Europe and Asia
Term
ÒOut of AfricaÓ Hypothesis
Definition
The view that modern humans evolved in Africa then migrated to Europe and Asia, displacing other species
Term
A. bahrelgazali
Definition
Australopithecine found in Chad
Term
A. garhi
Definition
Species of Australopithecine found in Ethiopia
Term
A.africanus
Definition
The first fossil pre-human to be found in Africa
Term
Arboreal
Definition
Tree dwelling
Term
Abstract Thought
Definition
Reasoning: thinking that is coherent and logical
Term
Acheulean (Acheulian)
Definition
A style of stone implements shaped by flaking and with fine edges worked on both sides. Associated with Homo ergaster and H. Erectus, and wide spread in Africa, Europe and parts of Asia from 1.5 million years ago to about 150 000 years ago
Term
African
Definition
Coming from the continent of Africa
Term
Ape
Definition
Any of various primates with short tails or no tail at all
Term
Archaic
Definition
so extremely old as seeming to belong to an earlier period
Term
Ardipithecus ramidus
Definition
Early (4.4 million years) species of Australipthicus
Term
Art/decoration
Definition
The products of human creativity
Term
Asian
Definition
Coming from the continent of Asia
Term
Australopithecus afarensis
Definition
Early species of Australipthicus, probably close to the ancestor of humans
Term
Australopithesus anamensis
Definition
The oldest known species of Australipthicus
Term
Australopithicine
Definition
any of several extinct humanlike bipedal primates with relatively small brains of the genus Australopithecus; from 1 to 4 million years ago
Term
Biological Evolution
Definition
the process of change in the inherited traits of a population of organisms from one generation to the next
Term
Bipedialism
Definition
Using only hind limbs for locomotion
Term
Brachiation
Definition
Locomotion by using arms to swing beneath the branches of trees, from one branh to the next
Term
BrocaÕs area
Definition
The part of the brain that organises separate sounds into words
Term
Brow Ridge
Definition
Refer to a bony ridge located above the eye sockets of all primates
Term
Burial
Definition
Concealing something under the ground
Term
Canine
Definition
One of the four teeth in the front corners of a mammalÕs mouth. Usually large and pointed in carnivores and small or absent in herbivores
Term
Carbon Dating
Definition
Methods of finding out the age of artefacts that contain materials that were once alive
Term
Cerebullum
Definition
The largest part of the hind-brain of vertebrates, concerned with co-ordination of movement
Term
Chin
Definition
the protruding part of the lower jaw
Term
Climate
Definition
The long-term average weather pattern of a region
Term
Competition
Definition
Occurs when organisms living in the same location require the same resource, for which demand exceeds supply
Term
Cultural evolution
Definition
Rapid evolution of behaviour in a group based on learning passed on from the previous generation and not based upon genetic material, although eventually subject to natural selection
Term
Culture
Definition
The cranial vault is the space in the skull within the neurocranium, where the brain is found
Term
Dentition
Definition
The kind and number and arrangement of teeth (collectively) in a person or animal
Term
Dexterity
Definition
Fine motor skills can be defined as coordination of small muscle movements which occur e.g., in the fingers, usually in coordination with the eyes
Term
Diastema
Definition
A gap in the rows of teeth in a mammals jaw
Term
Diet
Definition
The usual food and drink consumed by an organism
Term
Domestication
Definition
The process of the adaptation of an animal or plant species through selective breeding in captivity so it is of more use to humans, usually also reducing its fitness to survive in the wild
Term
Enamal
Definition
Hard white substance covering the crown of a tooth
Term
European
Definition
Coming from the continent of Europe
Term
Extinction
Definition
Occurs when the last member dies
Term
Facial angle
Definition
The slope of the face of an animal
Term
Femoral condyles
Definition
The two knobs at the bottom of the thigh bone that sit on the meniscus and tibial plateau
Term
Foramen magnum
Definition
The opening at the base of the skull through which the spina cord passes
Term
Forehead
Definition
The part of the face above the eyes
Term
Fossil evidence
Definition
Fossils being used to prove theories
Term
Frontal Lobe
Definition
That part of the cerebral cortex in either hemisphere of the brain lying directly behind the forehead
Term
Gathering
Definition
A group of persons together in one place
Term
Gene Flow
Definition
Exchange of alleles between population by immigration and emigration
Term
Gracile
Definition
Lightly constructed, as referring to the overall appearance of a hominid skeleton
Term
Great Toe
Definition
The first largest innermost toe
Term
H. erectus
Definition
First human ancestor to use fire
Term
H. ergaster
Definition
Aftican species of Homo, considered by many to be a variant of H. erectus
Term
H. floreniensis
Definition
Very small-bodied fossil human, found on island of Flores
Term
H. heidelbergensis
Definition
First human species for which there is firm evidence for systematic hunting
Term
H. neanderthalensis
Definition
First humans to bury the dead and care for the aged
Term
H. rudolfensis
Definition
Early species of Homo, contemporaneous with H. Habilis
Term
H. sapiens
Definition
Modern humans
Term
Habitat
Definition
The place an organism lives
Term
Hominid
Definition
Any member of the family Hominidae, which includes all fossil and living members of the genera Australopithecus, Paranthropus and Homo
Term
Hominidae
Definition
Family containing humans, African apes and orang-utans
Term
Hominin
Definition
A member of the proposed subfamily Hominae
Term
Homo habilis
Definition
Earliest proto-uhuman to make stone tools
Term
Human
Definition
Any living or extinct member of the family Hominidae characterized by superior intelligence, articulate speech, and erect carriage
Term
Isotope dating
Definition
The process of using relative proportions of parent to daughter isotopes in radioactive decay to determine the age of a given rock or rock stratum.
Term
Knuckle walking
Definition
A type of quadrupedal locomotion b chimpanzees and gorillas where the upper body is supported by the back of the knuckles rather than by the palms or fingers
Term
Mandible
Definition
The lower jaw, which is a single fused bone in monkeys, apes and humans
Term
Modern
Definition
Pertaining to the current time and style
Term
Molar
Definition
The grinding or cheek teeth at the ear of the jaw of mammals
Term
Mousterian
Definition
A style of stone flake tools having some degree of symmetry mostly small hand-axes, side scrapers, and triangular blades tied to handles, from around 200 000 to about 40 000 years ago, typically associated with Homo Neanderthalensis
Term
MtDNA
Definition
The circular DNA molecule found in mitochondria. It is not formed by recombination and is usually passed on only along the female line
Term
Nomadic
Definition
Communities of people that move from one place to another, rather than settling down in one location
Term
Nuchal crest
Definition
A bony ridge across the back of a skull to which muscles supporting the head are attached
Term
Oldowan
Definition
The oldest known tradition of stone tools, appearing about 2.4mya being flake and pebble tools with shaping being mostly only an edge formed by chipping stone. Associated with H.habilis
Term
Opposable thumb
Definition
The ability to rotate the thumb so that it touches other digits on the same hand allowing small objects to be grasped
Term
Orrorin tugenesis
Definition
Six million year old hominan found in Kenya
Term
P. boisei
Definition
An early hominin and described as the largest of the Paranthropus species. It lived from about 2.6 until about 1.2 million years ago during the Pliocene and Pleistocene epochs in Eastern Africa.
Term
Palate
Definition
The upper surface of the mouth that separates the oral and nasal cavities
Term
Paranthropus robustus.
Definition
The southern African robust hominid, dated from 2.2 to 1.5 mya. It was marked by robust chewing features, although they were less robust than in either P. aethiopicus or P. boisei. The postcranial skeleton and the brain size remained similar to those of Australopithecus. It is sometimes included in that genus.
Term
Paranthropus sp.
Definition
Genus of Australopithicine with massive jaws and molars
Term
Population
Definition
Group of organisms from the same species living in the same location
Term
Post cranial Skeletal
Definition
Refers to the bones that are situated beneath the skull
Term
Potassium-argon dating
Definition
Geological dating that relies on the proportions of radioactive potassium in a rock sample and its decay product, argon
Term
Prehensile tail
Definition
The tail of an animal that has adapted to be able to grasp and/or hold objects
Term
Primate
Definition
The group of mammals that are primarily adapted for arboreal life
Term
Prognathism
Definition
Having protruding jaws
Term
Quadrupedal
Definition
Having four feet
Term
Robust
Definition
Ruggedly built, especially face and jaws
Term
Sachelanthropus tchadensis
Definition
Seven to six million year old species of hominin found in Chad
Term
Sagittal crest
Definition
A ridge running lengthwise along the top of a skull to which jaw muscles are attached
Term
Savannah
Definition
Flat grassland in tropical or subtropical regions
Term
Selection Pressures
Definition
The strength of natural selection for or against a particular trait
Term
Sexual Dimorphism
Definition
Noticeable physical differences between males and females of a species in addition to sex organs, such as size, shape, colour, teeth, etc
Term
Social organisation
Definition
The people in a society considered as a system organized by a characteristic pattern of relationships
Term
Thermoregulation
Definition
The ability of an organism to keep its body temperature within certain boundaries
Term
Upper Palaeolithic
Definition
Later phase of the old stone age
Term
Valgus Angle
Definition
The angle formed by the femur with the pelvis allowing the knees to be closer together than the hip joints
Term
WernickeÕs Area
Definition
Brain centre responsible for interpreting the auditory output of language
Term
Y chromosome
Definition
Sex chromosome only found in males
Term
Zygomatic arches
Definition
Cheek bones
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