Ch 24
origin of species
origin of species
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Cartes-fiches
__ separate species and prevent them from successfully interbreeding
__ populations live in different habitats and do not meet
__ populations reproduce in different seasons or different times.
__ different mating rituals and no attraction between the different species.
__ structural differences prevent reproduction.
__ eggs and sperm don’t bind/attract one another.
Prevent mating or fertilization
Prevent the development of viable, fertile adults.
__ hybrid zygotes fail to develop or reach sexual maturity
__ hybrids fail to produce functional gametes.
__ The offspring of hybrids have reduced viability or fertility.
the separation of species by geographical barriers. The gene pools of the 2 populations cannot mix and they evolve into 2 species independently. Works best on small groups of organisms.
occurs when many diverse species evolve from a common ancestor.
occurs when 2 species diverge in the same place.
the most common mechanism of sympatric speciation.
