CHAPTER 14 The Origin of Species
Flashcard maker : Lily Taylor
process by which one species splits into two more more species
biological species concept
definition of a species as a population or group of populations whose members can breed with one another in nature and produce fertile offspring
condition in which a reproductive barrier keeps two species from interbreeding
phylogenetic species concept
A definition of species as the smallest group of individuals that share a common ancestor, forming one branch on the tree of life.
prevent mating or fertilization between species
habitat, behavioral, temporal, mechanical, and gametic isolation
prezygotic barrier pnemonic
his bad temper made graves
a reproductive barrier that prevent hybrid zygotes produced by two different species from developing into viable, fertile adults
The formation of new species in populations that are geographically isolated from one another.
The formation of new species in populations that live in the same geographic area
evolution from a common ancestor of many species adapted to diverse environments
Peter and Rosemary Grant
watched evolution in finches (observed beak size in finches) on Daphne Major in Galapagos Islands
areas where diverging allopatric populations come back into contact and members of the different species interbreed
selection for species-recognition traits that prevent hybridization
natural selection that favors individuals with either extreme of a trait, natural selection that favors individuals with either extreme of a trait; tends to eliminate intermediate phenotypes. reinforcement is an example.
separation of a species from another.
The study of rates of colonization and extinction of species on islands or other isolated areas based on size, shape, and distance from other inhabited regions
he developed equations for island biogeography
Equilibrium Number of Species
Point where colonization and extinction intersect
sudden change in evolution followed by a long period of no change.