Concepts | Questions | Media Resources |
24.1 Origin of Life | 24.1 Origin of Life | 24.1 Origin of Life |
- A chemical evolution produced the first cell(s).
| - What type evolution produced the first cells?
Answer
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24.2 Biological Evolution | 24.2 Biological Evolution | 24.2 Biological Evolution |
- All living things are descended from the first cell(s), and therefore they share a cellular structure and a common chemistry.
- Darwin gathered evidence for common descent and proposed a mechanism for natural selection.
- The process of natural selection accounts for the great diversity of living things.
| - What is biological evolution and what are its two most important aspects?
Answer
- What type of evidence convinced Charles Darwin that biological evolution
does occur?
Answer
- What process accounts for the great diversity of living things?
Answer
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24.3 Humans Are Primates | 24.3 Humans Are Primates | 24.3 Humans Are Primates |
- Humans (Homo sapiens) are in the order Primates, which are mammals adapted to living in trees.
- Primate characteristics include an enlarged brain, opposable thumb, stereoscopic vision, and an emphasis on learned behavior.
| - How are humans classified?
Answer
- What are the characteristics of all primates and how are primates related to one another?
Answer
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24.4 Evolution of Australopithecines | 24.4 Evolution of Australopithecines | |
- About 3 million years ago, several species of australopithecines
(the first hominids) evolved in Africa. The australopithecines had a
small brain, but they walked erect.
| - What are the characteristics of the hominids that were prevalent in Africa about 3 MYA1?
Answer
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24.5 Evolution of Humans | 24.5 Evolution of Humans | 24.5 Evolution of Humans |
- About 2 million years ago, Homo habilis, the first hominid
to make tools, was most likely a hunter, and may have been able to speak.
- About 1.9 to 1.6 million years ago, Homo erectus migrated
out of Africa and was a big-game hunter that possessed fire.
- The out-of-Africa hypothesis says that modern humans evolved in Africa
and after migrating to Europe and Asia, they replaced any Homo species
there, including the Neanderthals.
- Cro-Magnon is the name given to modern humans who made sophisticated
tools and definitely had culture.
| - How might Homo habilis, living about 2 MYA, have differed from
the earlier hominids?
Answer
- How might Homo erectus, living about 1.9 to 1.6 MYA, have differed
from Homo habilis?
Answer
- What is the out-of-Africa hypothesis and what bearing does it have on the evolution of humans?
Answer
- How does Cro-Magnon, the first of the modern humans, differ from the
other species in the genus Homo?
Answer
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