macroevolution + speciation

macroevolution looks at these 2 processes

speciation and extinction

what defines a species?

cannot breed with each other

reproductive isolation maintains…

differences between groups

biological species concept is like the major…

definition of species

biological species concept states…

a species is a group that doesnt interbreed with other groups

zygote

fertilized egg

reproductive isolating mechanisms do what to gene flow?

decrease

(strong) enough reproductive isolating mechanisms lead to new...

species

2 main types of isolating mechanisms

prezygotic, postzygotic

2 categories of prezygotic isolation mechanisms

premating, mating

3 types of premating isolation

temporal, habitat, behavioral

habitat isolation

different habitat prevents encounters/mating

temporal isolation

species reproduce at different times/seasons

behavioral isolation

females of one species dont recognize males of another species as potential mates