ESTUDYR
ASM 246 FINAL UPDATED EXAM WITH MOST TESTED QUESTIONS AND
ANSWERS | GRADED A+ | ASSURED SUCCESS WITH DETAILED
RATIONALES
First A. afarensis Fossil at Hadar: The very first Australopithecus afarensis fossil discovered at Hadar
was a:
A. Partial skull
B. Knee joint
C. Pelvic fragment
D. Tooth row
Rationale: The initial find at Hadar in 1973 was a distal femur/knee joint, indicating bipedal adaptations.
Lucy’s Age: The Australopithecus afarensis specimen known as “Lucy” dates to approximately:
A. 2.0 million years ago
B. 4.5 million years ago
C. 3.2 million years ago
D. 1.5 million years ago
Rationale: Radiometric dating of the Hadar strata places Lucy at about 3.18 Ma.
Laetoli Footprints: The 3.6 million-year-old hominin footprints at Laetoli demonstrate:
A. Arboreal grasping feet
B. Footprints similar to chimpanzees
C. A human-like foot adapted to bipedalism
D. Use of footwear
Rationale: The footprints show a pronounced heel strike and adducted big toe, hallmarks of habitual
bipedalism.
Endocast Definition: An imprint of the inner surface of the braincase, such as found with the Taung
Child, is called a(n):
A. Craniogram
B. Neuroform
C. Endocast
D. Paleocranium
Rationale: Endocasts preserve details of brain morphology from the inside of the cranial vault.
Sagittal Crest in A. africanus: Which statement about Australopithecus africanus is correct?
A. It had a prominent sagittal crest
B. It lacked a sagittal crest
,ESTUDYR
C. It had an enlarged nuchal crest only
D. It displayed both sagittal and nuchal crests
Rationale: A. africanus shows no sagittal crest, indicating less massive chewing muscles than robust
forms.
Sagittal Crest in A. robustus: Australopithecus robustus is distinguished by:
A. A highly prognathic face
B. A pronounced sagittal crest
C. A small zygomatic arch
D. Absence of molar enlargement
Rationale: The crest anchored huge temporalis muscles for heavy chewing of tough foods.
Temporal Range of A. afarensis: Australopithecus afarensis existed approximately between:
A. 5.5–4.0 Ma
B. 2.5–1.0 Ma
C. 3.9–3.0 Ma
D. 4.5–2.5 Ma
Rationale: Fossil sites in Ethiopia and Tanzania date A. afarensis to this 900,000-year span.
Lucy’s Pelvic Similarity: True or false? Despite a narrower birth canal, Lucy’s pelvis is more similar to a
human pelvis than to a chimpanzee’s.
A. False
B. True
Rationale: The flared ilia and broad sacrum show adaptations for upright walking more like Homo than
Pan.
Facial Prognathism in A. afarensis: True or false? A. afarensis specimens have projecting faces more
akin to chimpanzees than modern humans.
A. True
B. False
Rationale: They retained moderate prognathism, though less extreme than extant apes.
Lucy’s Discovery Year: Lucy was discovered in:
A. 1969
B. 1984
C. 1974
D. 1979
Rationale: Donald Johanson and colleagues unearthed Lucy on November 24, 1974.
, ESTUDYR
Curved Phalanges: True or false? The finger bones of Australopithecus afarensis are slightly curved,
similar to chimpanzees.
A. True
B. False
Rationale: Curved phalanges suggest some retained arboreal capabilities.
Species Longevity: True or false? Fossil evidence suggests A. afarensis existed for at least 1 million
years, indicating a long-lived species.
A. True
B. False
Rationale: The range from 3.9 to 3.0 Ma spans nearly 1 Ma, a lengthy duration for a hominin species.
Size Variation in A. afarensis: True or false? A. afarensis fossils show very little variation in body size.
A. True
B. False
Rationale: Sexual dimorphism in A. afarensis is pronounced, with males much larger than females.
Shared Dental Trait: Which trait does A. afarensis share with modern chimpanzees?
A. Parabolic dental arcade
B. Parallel tooth rows
C. Reduced canines
D. Thick enamel
Rationale: The U-shaped arcade and parallel rows resemble Pan more than Homo.
Raymond Dart’s Profession: Raymond Dart, who described the Taung Child, was a(n):
A. Geologist
B. Archaeologist
C. Anatomist
D. Zoologist
Rationale: Dart’s anatomical expertise led him to recognize the endocast and dental morphology of A.
africanus.
Taung Child Discovery Context: True or false? The Taung Child was found during a mining operation.
A. True
B. False
Rationale: Limestone quarry workers in Taung, South Africa uncovered the specimen in 1924.
South African Sites: Sterkfontein and which other site are famed hominin localities in South Africa?
A. Olduvai Gorge
B. Laetoli
ASM 246 FINAL UPDATED EXAM WITH MOST TESTED QUESTIONS AND
ANSWERS | GRADED A+ | ASSURED SUCCESS WITH DETAILED
RATIONALES
First A. afarensis Fossil at Hadar: The very first Australopithecus afarensis fossil discovered at Hadar
was a:
A. Partial skull
B. Knee joint
C. Pelvic fragment
D. Tooth row
Rationale: The initial find at Hadar in 1973 was a distal femur/knee joint, indicating bipedal adaptations.
Lucy’s Age: The Australopithecus afarensis specimen known as “Lucy” dates to approximately:
A. 2.0 million years ago
B. 4.5 million years ago
C. 3.2 million years ago
D. 1.5 million years ago
Rationale: Radiometric dating of the Hadar strata places Lucy at about 3.18 Ma.
Laetoli Footprints: The 3.6 million-year-old hominin footprints at Laetoli demonstrate:
A. Arboreal grasping feet
B. Footprints similar to chimpanzees
C. A human-like foot adapted to bipedalism
D. Use of footwear
Rationale: The footprints show a pronounced heel strike and adducted big toe, hallmarks of habitual
bipedalism.
Endocast Definition: An imprint of the inner surface of the braincase, such as found with the Taung
Child, is called a(n):
A. Craniogram
B. Neuroform
C. Endocast
D. Paleocranium
Rationale: Endocasts preserve details of brain morphology from the inside of the cranial vault.
Sagittal Crest in A. africanus: Which statement about Australopithecus africanus is correct?
A. It had a prominent sagittal crest
B. It lacked a sagittal crest
,ESTUDYR
C. It had an enlarged nuchal crest only
D. It displayed both sagittal and nuchal crests
Rationale: A. africanus shows no sagittal crest, indicating less massive chewing muscles than robust
forms.
Sagittal Crest in A. robustus: Australopithecus robustus is distinguished by:
A. A highly prognathic face
B. A pronounced sagittal crest
C. A small zygomatic arch
D. Absence of molar enlargement
Rationale: The crest anchored huge temporalis muscles for heavy chewing of tough foods.
Temporal Range of A. afarensis: Australopithecus afarensis existed approximately between:
A. 5.5–4.0 Ma
B. 2.5–1.0 Ma
C. 3.9–3.0 Ma
D. 4.5–2.5 Ma
Rationale: Fossil sites in Ethiopia and Tanzania date A. afarensis to this 900,000-year span.
Lucy’s Pelvic Similarity: True or false? Despite a narrower birth canal, Lucy’s pelvis is more similar to a
human pelvis than to a chimpanzee’s.
A. False
B. True
Rationale: The flared ilia and broad sacrum show adaptations for upright walking more like Homo than
Pan.
Facial Prognathism in A. afarensis: True or false? A. afarensis specimens have projecting faces more
akin to chimpanzees than modern humans.
A. True
B. False
Rationale: They retained moderate prognathism, though less extreme than extant apes.
Lucy’s Discovery Year: Lucy was discovered in:
A. 1969
B. 1984
C. 1974
D. 1979
Rationale: Donald Johanson and colleagues unearthed Lucy on November 24, 1974.
, ESTUDYR
Curved Phalanges: True or false? The finger bones of Australopithecus afarensis are slightly curved,
similar to chimpanzees.
A. True
B. False
Rationale: Curved phalanges suggest some retained arboreal capabilities.
Species Longevity: True or false? Fossil evidence suggests A. afarensis existed for at least 1 million
years, indicating a long-lived species.
A. True
B. False
Rationale: The range from 3.9 to 3.0 Ma spans nearly 1 Ma, a lengthy duration for a hominin species.
Size Variation in A. afarensis: True or false? A. afarensis fossils show very little variation in body size.
A. True
B. False
Rationale: Sexual dimorphism in A. afarensis is pronounced, with males much larger than females.
Shared Dental Trait: Which trait does A. afarensis share with modern chimpanzees?
A. Parabolic dental arcade
B. Parallel tooth rows
C. Reduced canines
D. Thick enamel
Rationale: The U-shaped arcade and parallel rows resemble Pan more than Homo.
Raymond Dart’s Profession: Raymond Dart, who described the Taung Child, was a(n):
A. Geologist
B. Archaeologist
C. Anatomist
D. Zoologist
Rationale: Dart’s anatomical expertise led him to recognize the endocast and dental morphology of A.
africanus.
Taung Child Discovery Context: True or false? The Taung Child was found during a mining operation.
A. True
B. False
Rationale: Limestone quarry workers in Taung, South Africa uncovered the specimen in 1924.
South African Sites: Sterkfontein and which other site are famed hominin localities in South Africa?
A. Olduvai Gorge
B. Laetoli
