Reproductive barriers
prevents species from reproducing ( & could form new species )
Allopatric Speciation
speciation because of land or water barrier forms between populations different land
( canyons , river ,Central american isthmus )
flowering plants
flower color attacks certain pollinators = reproduction barrier
Sympatric speciation
more common in plants = able to self fertilize ( same land )
Polyploidy
multiple copies of chromosome
islands
can showcase speciation
Adaptive Radiation
evolution of multiple species from a common ancestor
Ex . darwin's finches on the galapagos islands
Hybrid zones
region where separate species come together and create hybrids.
What happens to the hybrids formed?
Fusion
Reinforcement
Stability
Fusion
2 go species into 1
Reinforcement
natural selection acts against hybrids ; maintains special species
stability
separate species are maintained but hybrids are stable