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Speciation definition
The development of a new species
Speciation process
Two populations become separated
Cannot interbreed (reproductively isolated)
Natural selection acts differently
Characteristics diverge
After time look recognizably different
If populations merge again may not be able to interbreed
They have evolved into separate species
Reproductive isolation
Species must stop interbreeding with each other
Speciation requires barriers preventing gene flow between the gene pools of the two populations.
This can be achieved by any method of reproductive isolation.
Geographical reproductive isolation
A physical barrier divides a population of a species preventing interbreeding