Please enable JavaScript.
Coggle requires JavaScript to display documents.
Biology - Trends in Human Evolution - Coggle Diagram
Biology - Trends in Human Evolution
Forms of dispersal
Multiregional Theory
H.Erectus left Africa 1.8 MYA to Europe and Asia
H. Erectus evolved to produce modern H.Sapiens in all three areas. Gene flow between populations.
High level of gene flow is required to support this hypothesis along with lots of genetic variation.
Out of Africa Theory (replacement theory)
States that H.Sapiens left much later (approximately 200,000YA), so we evolved in Africa.
Spread gradually, incrementally, killing off other species.
H.Erectus left 1.8MYA but due to environmental conditions, were killed off.
These movements were made possible by the ice age, with the sea levels dropping.
If parallel evolution has occurred, there would be more genetic diversity. All modern humans have similar genes and nuclear sequences. mtDNA are passed down the female line unchanged save for mutation.
Types of evolution
Biological Evolution
Occurs through our genes, and can only be passed on genetically, consequently resulting in it occurring very slowly. Strongly linked to skeletal changes, and bipedalism
Cultural evolution is specifically regarded to aspects such as fire, tools, and other various things.
Farming
Pros
Greater variety of food, easier to supply food, fewer people died of starvation, fewer people need to work, giving more opportunity for development.
Cons
Diet restricted to what they could grow, more dependent on the weather, diseases flourished, very time consuming, altercations over land.
Tools
Oldowan, Acheulian, Mousterian, Upper Paleoithic
Better Hunting and therefore link that to the positive feedback cycle.
Better Tools
More efficient hunting
1 more item...
Cultural Evolution
The non-genetic passing of information through the teaching of ideas, beliefs and knowledge by learning from other members of a cohort. Cultural evolution occurs fast!