What is the genetic evidence that the origins of modern humans are in Africa?
The fossil record of the first possible bipeds dates back over 6 Myr ago in Africa. By 4.2 Myr ago, there is definite evidence of bipedal hominins in Africa (Australopithecus anamensis). These early hominins walked upright (at least on the ground), had ape-sized brains and larger protruding faces and teeth.
What are some examples of evolution that have shaped the human species?
7 strange and surprising ways that humans have recently evolved
- Drinking milk as adults. liz west/flickr.
- Disease resistance. Rod-shaped Mycobacterium tuberculosis bacteria CDC.
- Blue eyes. Flickr/Antoine K.
- High-altitude breathing. REUTERS/Damir Sagolj.
- Missing wisdom teeth.
- Alcohol flush reaction.
- Shrinking brains.
What are the two main theories about the origin of modern humans?
Historically, two key models have been put forward to explain the evolution? of Homo sapiens. These are the ‘out of Africa’ model and the ‘multi-regional’ model. The ‘out of Africa’ model is currently the most widely accepted model. It proposes that Homo sapiens evolved in Africa before migrating across the world.
How do we know that the first human beings evolved on the African continent?
The Middle Stone Age Evidence of more complex stone tools is found across Africa and dates to about the same time period. This evidence from across the continent adds weight to the idea that modern humans evolved all over Africa, not just in one area.
What is an example of a species changing over time?
Flightless Birds Over many generations, ostriches and emus evolved to have larger bodies and feet made for running on land, which left them without the ability (or need) to fly. The same goes for penguins, who traded typical wings for swim-friendly flippers over many thousands of generations.
Which of the following species is most closely related to modern humans?
The correct answer is Homo erectus. The genus Homo constitutes all the species that show similarity to most of the features to that of the human…