IB Biology A4.1.6 Speciation by splitting of pre-existing species
IB Biology A4.1.6 Speciation by splitting of pre-existing species
Practise explaining speciation as a split from an existing species, using isolation, selection, variation and changing gene pools.
How this is tested
- explain how isolation separates gene pools and reduces interbreeding between populations
- link variation and natural selection to different adaptations in separated groups
- apply speciation ideas to examples such as wrens, rice subspecies or courtship behaviour