Flashcards · Biology · Evolution and Natural Selection
Fossil Evidence for Human Evolution
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How old is Ardi?
About 4.4 million years.
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How old is Lucy?
About 3.2 million years.
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How old are the Leakey Homo erectus fossils?
About 1.6 million years.
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Where were Ardi and Lucy found?
In Ethiopia.
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Which fossil was found by Donald Johanson?
Lucy.
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What was Ardi's brain volume?
About 300 to 350 cm³.
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What was Lucy's brain volume?
About 400 cm³.
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What was the Homo erectus boy's brain volume?
About 880 cm³.
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What did Lucy's pelvis show?
She walked upright on two legs.
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Why did Ardi have a grasping toe?
To climb trees.
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What evolved first, walking upright or a big brain?
Walking upright.
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Give one limitation of the fossil record.
It is incomplete, because few organisms are fossilised.
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Why do scientists disagree about fossils?
Often only a few bones are found, so they are hard to classify.
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Which animal is our closest living relative?
The chimpanzee.
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Where in the world were most early hominid fossils found?
East Africa.
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Common mistake about human evolution?
Saying humans evolved from chimpanzees. We share a common ancestor.