Anth028, Chapter 10
Terms in this set (50)
In East Africa, robust australopithecines are also called
The diversity of the hominins included increasingly specialized:
Evidence indicating that Orrorin tugenensis was bipedal comes mainly from which part of the skeleton?
Using tools and toolmaking is an adaptation by hominins linked to:
Australopithecus robustus's large masticatory complex (large molars, face, and muscles) indicate an adaptation to:
eating foods requiring heavy chewing
According to the Larsen text (and based on the research of Philip Reno), some scholars argue that early hominins show reduced sexual dimorphism, which is evidence for cooperation and likely for:
Ardi's intermediate form of bipedality included the use of:
palms and feet to move along the tree branches
In an ape, the space between the upper lateral incisor and the canine that accommodates a large, projecting lower canine is a:
The earliest hominins probably lived in which kind of environment?
complex hybrid habitats
An increased ability to see greater distances is one of the adaptations to:
Australopithecus garhi has been proposed as an ancestor for Homo mainly because it:
had longer legs relative to arm length than other australopithecine
The Oldowan Complex includes tools like:
choppers, cobbles, flakes, and bone tools.
The patchy forest hypothesis proposes that forests:
became patchy and food more dispersed.
The only preaustralopithecine found outside the East African Rift Valley is:
Owen Lovejoy's provisioning hypothesis proposes that:
monogamy and food provisioning created the necessity for bipedalism.
The first hominids...
were bipedal and had small cranial capacities.
The oldest known robust australopithecine species is
The later (3-2mya) species of gracile Australopithecines have been found in
South Africa and East Africa
The oldest suggested possible hominids, dating back close to 6 million years ago, are classified as
Sahelanthropus, Orrorin, and Ardipithecus
The robust australopithecines were extinct by...
The three species of robust australopithecine are
Australopithecus robustus, Australopithecus boisei, and Australopithecus afarensis
The canine teeth of Australopithecus afarensis are...
smaller than modern apes, but larger than modern humans
Compared to other hominid species, the robust australopithecines have relatively ______ front teeth and ______ back teeth
Sahelanthropus, Orrorin, and Ardipithecus are...
Imagine you have found a skull with an ape-size brain, very large back teeth, and large cheekbones. Based on this information, this is most likely a specimen of
Many hypotheses regarding the origin of bipedalism have assumed that the first bipeds evolved in the savanna. Why has this idea been recently challenged?
New evidence shows that the earliest hominids evolved in a woodland environment.
The ______ of Orrorrin suggests that it was bipedal
Bipedalism first appeared in
The first hominids are found in
Compared to the robust australopithecines, Australopithecus africans has...
dental proportions more similar to later Homo.
A sagittal crest found in...
the robust australopithecine
The fossil known as "Lucy" belongs to the species
The most definitive evidence for bipedalism found in Laetoli is
foot bones with an arch
The tool-use model of hominid origins has been rejected because
bipedalism existed long before stone tools were used.
Bipedalism may have been originally selected for, in part, because
it allows food and infants to be easily carried.
was biped, but retained considerable climbing/arboreal ability
Australopithecus africans lived roughly ______ million years ago
Distinctive traits of robust australopithecines include.....
small front teeth and large back teeth, and a big face and a sagittal crest
the discovery of Kenyanthropus Platyops was important because
it shows diversity in the hominin fossil record 3.5 mya
The Laetoli footprints demonstrate that the foot of Austrlopithecus afarensis was humanlike in having a...
rounded heel, non divergent bit toe, double arch
The earliest australopithecines first show up in the fossil record more than
A hominin is defined as having the following two obligate behaviors
bipedal locomotion and non honing chewing complex
the foundational behavior of hominins was
Fossils attributed to Australopithecus garhi were found at the Bouri site, in Ethiopia, along with
animal bones with cut marks
Do speech, advanced cognition, and complex material define a hominin?
Australopithecus robustus was likely the longest-surviving species of australopithecine in South Africa. It had
large molars, big face, sagittal crest
You find a fossil that you are sure shows evidence of bipedalism. You know this because which of the following anatomical traits is present?
kthisbones that angle in toward the knees
along with other distinct traits, robust australopithecines had large ____ adapted for grinding food
premolars and molars, and temporalis muscles and a sagittal crest
The species australopithecus anamnesis dates within the ______ million years ago range
the sagittal crest functions to...
anchor chewing muscles