Homework answers / question archive / 1 Which of the following traits can be used to differentiate humans from our closest living primate relative?    Multiple answers:  You can select more than one option A grasping hands B bipedality C large brain size D extensive tool use 2 Louis and Mary Leakey found two different fossil hominid skulls in the same rock layer at Olduvai Gorge: first they they named Zinjanthropus and then the following year Olduvai Hominid Number 7

1 Which of the following traits can be used to differentiate humans from our closest living primate relative?    Multiple answers:  You can select more than one option A grasping hands B bipedality C large brain size D extensive tool use 2 Louis and Mary Leakey found two different fossil hominid skulls in the same rock layer at Olduvai Gorge: first they they named Zinjanthropus and then the following year Olduvai Hominid Number 7

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1 Which of the following traits can be used to differentiate humans from our closest living primate relative? 

 

Multiple answers: 

You can select more than one option

A grasping hands

B bipedality

C large brain size

D extensive tool use

2 Louis and Mary Leakey found two different fossil hominid skulls in the same rock layer at Olduvai Gorge: first they they named Zinjanthropus and then the following year Olduvai Hominid Number 7. Which of the following statements about these two skulls is true?

A The first skull they found was several million years older than the second skull.

B The second skull represented a species more closely related to modern humans than the first skull's species.

C The second skull was that of a species that could walk upright and the first was not.

D Both skulls belonged to the "toolmaker" species that the Leakey's had been searching for.

3 The conclusion that the common ancestor of modern chimps and modern humans lived around 7 million years ago is supported by which of the following lines of evidence?

A Analysis of modern human and modern chimpanzee protein and DNA sequences suggests that their lineages diverged about 7 million years ago.

B Stone tools have been found that date back about 7 million years.

C Scientists estimate that it would take about 7 million years for chimps to evolve into humans.

D Scientists estimate that it takes about 2.5 million years for brains to double in volume, so it would take about 7 million years to go from 300 cubic centimeters (early hominid brain size) to 1500 cubic centimeters (modern human brain size)

4 Which of the three traits considered in this film (bipedality, extensive tool use, and large brain size) were present in the 3.2 million year old Australopithecus fossil (Lucy)?

A Lucy was a bipedal homind with a brain size similar to that of a modern human, demonstrating that bipedality and larger brains evolved together.

B Stone tools were found in the same rock layer where Lucy was found, showing that members of this species were making and using tools 3.2 million years ago.

C Lucy was a bipedal hominid and its discovery provided evidence that bipedality preceded the evolution of a larger brain size and extensive tool use.

D Lucy had a large brain, but there is no evidence that it used tools or walked mostly on two legs.

5 How do scientists know that the hominid called Ardi is about 4.4 million years old?

A By comparing Ardi's DNA to modern human DNA.

B By looking at Ardi's anatomical features.

C By comparing the stone tools found in the same sediment as Ardi to other stone tools of known age.

D By analyzing volcanic deposits above and below the layer containing Ardi.

6 What did scientists learn from other fossils found in the same sediment layer as Ardi?

A That Ardi and Lucy lived at the same time.

B That Ardi lived in a woodland habitat.

C That Ardi lived in an open grassland habitat.

D That Ardi raised livestock and domesticated crops.

7 Which of the following is an accurate statement regarding human evolution?

Multiple answers: 

You can select more than one option

A The first humans evolved in Africa.

B Once humans evolved bipedality tool use and larger brains they stopped evolving.

C The fossil record contains animals with features that are intermediate between those of modern humans and quadrupedal apes.

D In the most recent phase of human evolution there has been a greater reliance on culture